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Finding the Fourth Proportional to 542,458.80, 813,688.20 and 519,422.40

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Solution

The fourth proportional to 542,458.80, 813,688.20 and 519,422.40 is: 779,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,458.80 : 813,688.20 = 519,422.40 : x
  2. Step 2: Convert to fraction form
    542,458.80/813,688.20 = 519,422.40/x
  3. Step 3: Cross multiply
    542,458.80x = 813,688.20 × 519,422.40
  4. Step 4: Simplify right side
    542,458.80x = 422,647,877,695.68
  5. Step 5: Solve for x
    x = 422,647,877,695.68/542,458.80
  6. Step 6: Final answer
    x = 779,133.60

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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.