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Finding the Fourth Proportional to 305,489.20, 458,233.80 and 266,123.20

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Solution

The fourth proportional to 305,489.20, 458,233.80 and 266,123.20 is: 399,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,489.20 : 458,233.80 = 266,123.20 : x
  2. Step 2: Convert to fraction form
    305,489.20/458,233.80 = 266,123.20/x
  3. Step 3: Cross multiply
    305,489.20x = 458,233.80 × 266,123.20
  4. Step 4: Simplify right side
    305,489.20x = 121,946,645,204.16
  5. Step 5: Solve for x
    x = 121,946,645,204.16/305,489.20
  6. Step 6: Final answer
    x = 399,184.80

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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.