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Finding the Fourth Proportional to 392,001.20, 588,001.80 and 389,236.40

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Solution

The fourth proportional to 392,001.20, 588,001.80 and 389,236.40 is: 583,854.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,001.20 : 588,001.80 = 389,236.40 : x
  2. Step 2: Convert to fraction form
    392,001.20/588,001.80 = 389,236.40/x
  3. Step 3: Cross multiply
    392,001.20x = 588,001.80 × 389,236.40
  4. Step 4: Simplify right side
    392,001.20x = 228,871,703,825.52
  5. Step 5: Solve for x
    x = 228,871,703,825.52/392,001.20
  6. Step 6: Final answer
    x = 583,854.60

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Similar ratio
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1.5x scale

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.