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Finding the Fourth Proportional to 256,935.33, 385,428.90 and 88,433.46

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Solution

The fourth proportional to 256,935.33, 385,428.90 and 88,433.46 is: 132,659.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,935.33 : 385,428.90 = 88,433.46 : x
  2. Step 2: Convert to fraction form
    256,935.33/385,428.90 = 88,433.46/x
  3. Step 3: Cross multiply
    256,935.33x = 385,428.90 × 88,433.46
  4. Step 4: Simplify right side
    256,935.33x = 34,084,811,210.99
  5. Step 5: Solve for x
    x = 34,084,811,210.99/256,935.33
  6. Step 6: Final answer
    x = 132,659.11

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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.