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Finding the Fourth Proportional to 256,862.61, 385,383.88 and 79,369.62

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Solution

The fourth proportional to 256,862.61, 385,383.88 and 79,369.62 is: 119,082.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,862.61 : 385,383.88 = 79,369.62 : x
  2. Step 2: Convert to fraction form
    256,862.61/385,383.88 = 79,369.62/x
  3. Step 3: Cross multiply
    256,862.61x = 385,383.88 × 79,369.62
  4. Step 4: Simplify right side
    256,862.61x = 30,587,772,109.73
  5. Step 5: Solve for x
    x = 30,587,772,109.73/256,862.61
  6. Step 6: Final answer
    x = 119,082.23

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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.