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Finding the Fourth Proportional to 392,000.20, 588,000.30 and 389,235.40

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Solution

The fourth proportional to 392,000.20, 588,000.30 and 389,235.40 is: 583,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,000.20 : 588,000.30 = 389,235.40 : x
  2. Step 2: Convert to fraction form
    392,000.20/588,000.30 = 389,235.40/x
  3. Step 3: Cross multiply
    392,000.20x = 588,000.30 × 389,235.40
  4. Step 4: Simplify right side
    392,000.20x = 228,870,531,970.62
  5. Step 5: Solve for x
    x = 228,870,531,970.62/392,000.20
  6. Step 6: Final answer
    x = 583,853.10

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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.