Home / 438,128.39-657,309.02-138,614.28

Finding the Fourth Proportional to 438,128.39, 657,309.02 and 138,614.28

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Solution

The fourth proportional to 438,128.39, 657,309.02 and 138,614.28 is: 207,958.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,128.39 : 657,309.02 = 138,614.28 : x
  2. Step 2: Convert to fraction form
    438,128.39/657,309.02 = 138,614.28/x
  3. Step 3: Cross multiply
    438,128.39x = 657,309.02 × 138,614.28
  4. Step 4: Simplify right side
    438,128.39x = 91,112,415,851.73
  5. Step 5: Solve for x
    x = 91,112,415,851.73/438,128.39
  6. Step 6: Final answer
    x = 207,958.26

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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.