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Finding the Fourth Proportional to 256,890.55, 385,337.42 and 67,349.22

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Solution

The fourth proportional to 256,890.55, 385,337.42 and 67,349.22 is: 101,024.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,890.55 : 385,337.42 = 67,349.22 : x
  2. Step 2: Convert to fraction form
    256,890.55/385,337.42 = 67,349.22/x
  3. Step 3: Cross multiply
    256,890.55x = 385,337.42 × 67,349.22
  4. Step 4: Simplify right side
    256,890.55x = 25,952,173,015.73
  5. Step 5: Solve for x
    x = 25,952,173,015.73/256,890.55
  6. Step 6: Final answer
    x = 101,024.24

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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.