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Finding the Fourth Proportional to 487,309.97, 672,309.29 and 293,760.47

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Solution

The fourth proportional to 487,309.97, 672,309.29 and 293,760.47 is: 405,281.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,309.97 : 672,309.29 = 293,760.47 : x
  2. Step 2: Convert to fraction form
    487,309.97/672,309.29 = 293,760.47/x
  3. Step 3: Cross multiply
    487,309.97x = 672,309.29 × 293,760.47
  4. Step 4: Simplify right side
    487,309.97x = 197,497,888,185.42
  5. Step 5: Solve for x
    x = 197,497,888,185.42/487,309.97
  6. Step 6: Final answer
    x = 405,281.86

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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.