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Finding the Fourth Proportional to 487,547.28, 672,816.84 and 272,691

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Solution

The fourth proportional to 487,547.28, 672,816.84 and 272,691 is: 376,314.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,547.28 : 672,816.84 = 272,691 : x
  2. Step 2: Convert to fraction form
    487,547.28/672,816.84 = 272,691/x
  3. Step 3: Cross multiply
    487,547.28x = 672,816.84 × 272,691
  4. Step 4: Simplify right side
    487,547.28x = 183,471,096,916.44
  5. Step 5: Solve for x
    x = 183,471,096,916.44/487,547.28
  6. Step 6: Final answer
    x = 376,314.47

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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.