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Finding the Fourth Proportional to 392,764.80, 589,147.20 and 97,276.80

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Solution

The fourth proportional to 392,764.80, 589,147.20 and 97,276.80 is: 145,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,764.80 : 589,147.20 = 97,276.80 : x
  2. Step 2: Convert to fraction form
    392,764.80/589,147.20 = 97,276.80/x
  3. Step 3: Cross multiply
    392,764.80x = 589,147.20 × 97,276.80
  4. Step 4: Simplify right side
    392,764.80x = 57,310,354,344.96
  5. Step 5: Solve for x
    x = 57,310,354,344.96/392,764.80
  6. Step 6: Final answer
    x = 145,915.20

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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.