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Finding the Fourth Proportional to 438,545.40, 657,926.10 and 122,998.20

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Solution

The fourth proportional to 438,545.40, 657,926.10 and 122,998.20 is: 184,527.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,545.40 : 657,926.10 = 122,998.20 : x
  2. Step 2: Convert to fraction form
    438,545.40/657,926.10 = 122,998.20/x
  3. Step 3: Cross multiply
    438,545.40x = 657,926.10 × 122,998.20
  4. Step 4: Simplify right side
    438,545.40x = 80,923,726,033.02
  5. Step 5: Solve for x
    x = 80,923,726,033.02/438,545.40
  6. Step 6: Final answer
    x = 184,527.59

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1.5x scale

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.