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Finding the Fourth Proportional to 605,147.40, 907,721.10 and 418,523.40

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Solution

The fourth proportional to 605,147.40, 907,721.10 and 418,523.40 is: 627,785.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,147.40 : 907,721.10 = 418,523.40 : x
  2. Step 2: Convert to fraction form
    605,147.40/907,721.10 = 418,523.40/x
  3. Step 3: Cross multiply
    605,147.40x = 907,721.10 × 418,523.40
  4. Step 4: Simplify right side
    605,147.40x = 379,902,521,023.74
  5. Step 5: Solve for x
    x = 379,902,521,023.74/605,147.40
  6. Step 6: Final answer
    x = 627,785.10

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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.