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Finding the Fourth Proportional to 425,470.40, 636,893.40 and 378,231.20

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Solution

The fourth proportional to 425,470.40, 636,893.40 and 378,231.20 is: 566,180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,470.40 : 636,893.40 = 378,231.20 : x
  2. Step 2: Convert to fraction form
    425,470.40/636,893.40 = 378,231.20/x
  3. Step 3: Cross multiply
    425,470.40x = 636,893.40 × 378,231.20
  4. Step 4: Simplify right side
    425,470.40x = 240,892,954,954.08
  5. Step 5: Solve for x
    x = 240,892,954,954.08/425,470.40
  6. Step 6: Final answer
    x = 566,180.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.