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Finding the Fourth Proportional to 438,397.47, 657,540.76 and 138,908.43

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Solution

The fourth proportional to 438,397.47, 657,540.76 and 138,908.43 is: 208,345.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,397.47 : 657,540.76 = 138,908.43 : x
  2. Step 2: Convert to fraction form
    438,397.47/657,540.76 = 138,908.43/x
  3. Step 3: Cross multiply
    438,397.47x = 657,540.76 × 138,908.43
  4. Step 4: Simplify right side
    438,397.47x = 91,337,954,632.61
  5. Step 5: Solve for x
    x = 91,337,954,632.61/438,397.47
  6. Step 6: Final answer
    x = 208,345.08

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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.