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Finding the Fourth Proportional to 645,726.72, 891,046.23 and 359,262.53

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Solution

The fourth proportional to 645,726.72, 891,046.23 and 359,262.53 is: 495,750.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,726.72 : 891,046.23 = 359,262.53 : x
  2. Step 2: Convert to fraction form
    645,726.72/891,046.23 = 359,262.53/x
  3. Step 3: Cross multiply
    645,726.72x = 891,046.23 × 359,262.53
  4. Step 4: Simplify right side
    645,726.72x = 320,119,522,936.76
  5. Step 5: Solve for x
    x = 320,119,522,936.76/645,726.72
  6. Step 6: Final answer
    x = 495,750.78

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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.