Home / 438,426.20-657,658.44-138,928.87

Finding the Fourth Proportional to 438,426.20, 657,658.44 and 138,928.87

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Solution

The fourth proportional to 438,426.20, 657,658.44 and 138,928.87 is: 208,399.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,426.20 : 657,658.44 = 138,928.87 : x
  2. Step 2: Convert to fraction form
    438,426.20/657,658.44 = 138,928.87/x
  3. Step 3: Cross multiply
    438,426.20x = 657,658.44 × 138,928.87
  4. Step 4: Simplify right side
    438,426.20x = 91,367,744,737.24
  5. Step 5: Solve for x
    x = 91,367,744,737.24/438,426.20
  6. Step 6: Final answer
    x = 208,399.37

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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.