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Finding the Fourth Proportional to 572,058.76, 789,441.22 and 317,411.76

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Solution

The fourth proportional to 572,058.76, 789,441.22 and 317,411.76 is: 438,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,058.76 : 789,441.22 = 317,411.76 : x
  2. Step 2: Convert to fraction form
    572,058.76/789,441.22 = 317,411.76/x
  3. Step 3: Cross multiply
    572,058.76x = 789,441.22 × 317,411.76
  4. Step 4: Simplify right side
    572,058.76x = 250,577,927,056.75
  5. Step 5: Solve for x
    x = 250,577,927,056.75/572,058.76
  6. Step 6: Final answer
    x = 438,028.30

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Half scale
Find fourth proportional to 1,144,117.52, 1,578,882.44 and 634,823.52
Double scale
Find fourth proportional to 572,059.76, 789,442.60 and 317,412.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.