Home / 438,238.38-657,455.98-138,736.92

Finding the Fourth Proportional to 438,238.38, 657,455.98 and 138,736.92

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Solution

The fourth proportional to 438,238.38, 657,455.98 and 138,736.92 is: 208,136.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,238.38 : 657,455.98 = 138,736.92 : x
  2. Step 2: Convert to fraction form
    438,238.38/657,455.98 = 138,736.92/x
  3. Step 3: Cross multiply
    438,238.38x = 657,455.98 × 138,736.92
  4. Step 4: Simplify right side
    438,238.38x = 91,213,417,700.78
  5. Step 5: Solve for x
    x = 91,213,417,700.78/438,238.38
  6. Step 6: Final answer
    x = 208,136.53

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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.