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Finding the Fourth Proportional to 659,650.20, 988,892.10 and 393,127.80

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Solution

The fourth proportional to 659,650.20, 988,892.10 and 393,127.80 is: 589,344.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,650.20 : 988,892.10 = 393,127.80 : x
  2. Step 2: Convert to fraction form
    659,650.20/988,892.10 = 393,127.80/x
  3. Step 3: Cross multiply
    659,650.20x = 988,892.10 × 393,127.80
  4. Step 4: Simplify right side
    659,650.20x = 388,760,975,710.38
  5. Step 5: Solve for x
    x = 388,760,975,710.38/659,650.20
  6. Step 6: Final answer
    x = 589,344.13

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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.