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Finding the Fourth Proportional to 391,532.75, 587,299.13 and 169,916.75

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Solution

The fourth proportional to 391,532.75, 587,299.13 and 169,916.75 is: 254,875.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,532.75 : 587,299.13 = 169,916.75 : x
  2. Step 2: Convert to fraction form
    391,532.75/587,299.13 = 169,916.75/x
  3. Step 3: Cross multiply
    391,532.75x = 587,299.13 × 169,916.75
  4. Step 4: Simplify right side
    391,532.75x = 99,791,958,597.84
  5. Step 5: Solve for x
    x = 99,791,958,597.84/391,532.75
  6. Step 6: Final answer
    x = 254,875.13

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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.