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Finding the Fourth Proportional to 392,000.40, 586,688.40 and 344,761.20

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Solution

The fourth proportional to 392,000.40, 586,688.40 and 344,761.20 is: 515,987.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,000.40 : 586,688.40 = 344,761.20 : x
  2. Step 2: Convert to fraction form
    392,000.40/586,688.40 = 344,761.20/x
  3. Step 3: Cross multiply
    392,000.40x = 586,688.40 × 344,761.20
  4. Step 4: Simplify right side
    392,000.40x = 202,267,396,810.08
  5. Step 5: Solve for x
    x = 202,267,396,810.08/392,000.40
  6. Step 6: Final answer
    x = 515,987.73

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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.