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Finding the Fourth Proportional to 542,556.80, 813,259.20 and 261,891.20

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Solution

The fourth proportional to 542,556.80, 813,259.20 and 261,891.20 is: 392,558.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,556.80 : 813,259.20 = 261,891.20 : x
  2. Step 2: Convert to fraction form
    542,556.80/813,259.20 = 261,891.20/x
  3. Step 3: Cross multiply
    542,556.80x = 813,259.20 × 261,891.20
  4. Step 4: Simplify right side
    542,556.80x = 212,985,427,799.04
  5. Step 5: Solve for x
    x = 212,985,427,799.04/542,556.80
  6. Step 6: Final answer
    x = 392,558.77

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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.