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Finding the Fourth Proportional to 420,779.32, 580,677.60 and 229,792.71

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Solution

The fourth proportional to 420,779.32, 580,677.60 and 229,792.71 is: 317,115.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,779.32 : 580,677.60 = 229,792.71 : x
  2. Step 2: Convert to fraction form
    420,779.32/580,677.60 = 229,792.71/x
  3. Step 3: Cross multiply
    420,779.32x = 580,677.60 × 229,792.71
  4. Step 4: Simplify right side
    420,779.32x = 133,435,479,340.30
  5. Step 5: Solve for x
    x = 133,435,479,340.30/420,779.32
  6. Step 6: Final answer
    x = 317,115.11

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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.