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Finding the Fourth Proportional to 487,001.44, 672,097.68 and 280,332.64

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Solution

The fourth proportional to 487,001.44, 672,097.68 and 280,332.64 is: 386,879.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,001.44 : 672,097.68 = 280,332.64 : x
  2. Step 2: Convert to fraction form
    487,001.44/672,097.68 = 280,332.64/x
  3. Step 3: Cross multiply
    487,001.44x = 672,097.68 × 280,332.64
  4. Step 4: Simplify right side
    487,001.44x = 188,410,916,972.28
  5. Step 5: Solve for x
    x = 188,410,916,972.28/487,001.44
  6. Step 6: Final answer
    x = 386,879.59

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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.