Home / 438,045.40-657,149.22-138,601.36

Finding the Fourth Proportional to 438,045.40, 657,149.22 and 138,601.36

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Solution

The fourth proportional to 438,045.40, 657,149.22 and 138,601.36 is: 207,927.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,045.40 : 657,149.22 = 138,601.36 : x
  2. Step 2: Convert to fraction form
    438,045.40/657,149.22 = 138,601.36/x
  3. Step 3: Cross multiply
    438,045.40x = 657,149.22 × 138,601.36
  4. Step 4: Simplify right side
    438,045.40x = 91,081,775,614.94
  5. Step 5: Solve for x
    x = 91,081,775,614.94/438,045.40
  6. Step 6: Final answer
    x = 207,927.71

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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.