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Finding the Fourth Proportional to 866,230.60, 1,299,321.60 and 392,915.20

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Solution

The fourth proportional to 866,230.60, 1,299,321.60 and 392,915.20 is: 589,361.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,230.60 : 1,299,321.60 = 392,915.20 : x
  2. Step 2: Convert to fraction form
    866,230.60/1,299,321.60 = 392,915.20/x
  3. Step 3: Cross multiply
    866,230.60x = 1,299,321.60 × 392,915.20
  4. Step 4: Simplify right side
    866,230.60x = 510,523,206,328.32
  5. Step 5: Solve for x
    x = 510,523,206,328.32/866,230.60
  6. Step 6: Final answer
    x = 589,361.78

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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.