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Finding the Fourth Proportional to 572,018.19, 789,385.22 and 317,368.77

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Solution

The fourth proportional to 572,018.19, 789,385.22 and 317,368.77 is: 437,968.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,018.19 : 789,385.22 = 317,368.77 : x
  2. Step 2: Convert to fraction form
    572,018.19/789,385.22 = 317,368.77/x
  3. Step 3: Cross multiply
    572,018.19x = 789,385.22 × 317,368.77
  4. Step 4: Simplify right side
    572,018.19x = 250,526,210,793.81
  5. Step 5: Solve for x
    x = 250,526,210,793.81/572,018.19
  6. Step 6: Final answer
    x = 437,968.96

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Half scale
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Double scale
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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.