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Finding the Fourth Proportional to 392,008.80, 588,013.20 and 313,276.80

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Solution

The fourth proportional to 392,008.80, 588,013.20 and 313,276.80 is: 469,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,008.80 : 588,013.20 = 313,276.80 : x
  2. Step 2: Convert to fraction form
    392,008.80/588,013.20 = 313,276.80/x
  3. Step 3: Cross multiply
    392,008.80x = 588,013.20 × 313,276.80
  4. Step 4: Simplify right side
    392,008.80x = 184,210,893,653.76
  5. Step 5: Solve for x
    x = 184,210,893,653.76/392,008.80
  6. Step 6: Final answer
    x = 469,915.20

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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.