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Finding the Fourth Proportional to 520,197.17, 780,453.05 and 368,687.27

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Solution

The fourth proportional to 520,197.17, 780,453.05 and 368,687.27 is: 553,142.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,197.17 : 780,453.05 = 368,687.27 : x
  2. Step 2: Convert to fraction form
    520,197.17/780,453.05 = 368,687.27/x
  3. Step 3: Cross multiply
    520,197.17x = 780,453.05 × 368,687.27
  4. Step 4: Simplify right side
    520,197.17x = 287,743,098,621.97
  5. Step 5: Solve for x
    x = 287,743,098,621.97/520,197.17
  6. Step 6: Final answer
    x = 553,142.38

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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.