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Finding the Fourth Proportional to 487,251.64, 672,440.70 and 272,387.80

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Solution

The fourth proportional to 487,251.64, 672,440.70 and 272,387.80 is: 375,913.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,251.64 : 672,440.70 = 272,387.80 : x
  2. Step 2: Convert to fraction form
    487,251.64/672,440.70 = 272,387.80/x
  3. Step 3: Cross multiply
    487,251.64x = 672,440.70 × 272,387.80
  4. Step 4: Simplify right side
    487,251.64x = 183,164,642,903.46
  5. Step 5: Solve for x
    x = 183,164,642,903.46/487,251.64
  6. Step 6: Final answer
    x = 375,913.86

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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.