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Finding the Fourth Proportional to 605,221.20, 907,831.80 and 447,757.20

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Solution

The fourth proportional to 605,221.20, 907,831.80 and 447,757.20 is: 671,635.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,221.20 : 907,831.80 = 447,757.20 : x
  2. Step 2: Convert to fraction form
    605,221.20/907,831.80 = 447,757.20/x
  3. Step 3: Cross multiply
    605,221.20x = 907,831.80 × 447,757.20
  4. Step 4: Simplify right side
    605,221.20x = 406,488,224,838.96
  5. Step 5: Solve for x
    x = 406,488,224,838.96/605,221.20
  6. Step 6: Final answer
    x = 671,635.80

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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.