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Finding the Fourth Proportional to 358,671.40, 538,007.10 and 331,637.80

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Solution

The fourth proportional to 358,671.40, 538,007.10 and 331,637.80 is: 497,456.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,671.40 : 538,007.10 = 331,637.80 : x
  2. Step 2: Convert to fraction form
    358,671.40/538,007.10 = 331,637.80/x
  3. Step 3: Cross multiply
    358,671.40x = 538,007.10 × 331,637.80
  4. Step 4: Simplify right side
    358,671.40x = 178,423,491,028.38
  5. Step 5: Solve for x
    x = 178,423,491,028.38/358,671.40
  6. Step 6: Final answer
    x = 497,456.70

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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.