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Finding the Fourth Proportional to 572,065.76, 789,450.88 and 317,418.76

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Solution

The fourth proportional to 572,065.76, 789,450.88 and 317,418.76 is: 438,037.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,065.76 : 789,450.88 = 317,418.76 : x
  2. Step 2: Convert to fraction form
    572,065.76/789,450.88 = 317,418.76/x
  3. Step 3: Cross multiply
    572,065.76x = 789,450.88 × 317,418.76
  4. Step 4: Simplify right side
    572,065.76x = 250,586,519,410.51
  5. Step 5: Solve for x
    x = 250,586,519,410.51/572,065.76
  6. Step 6: Final answer
    x = 438,037.96

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Double scale
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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.