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Finding the Fourth Proportional to 542,742.40, 813,967.80 and 187,865.20

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Solution

The fourth proportional to 542,742.40, 813,967.80 and 187,865.20 is: 281,747.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,742.40 : 813,967.80 = 187,865.20 : x
  2. Step 2: Convert to fraction form
    542,742.40/813,967.80 = 187,865.20/x
  3. Step 3: Cross multiply
    542,742.40x = 813,967.80 × 187,865.20
  4. Step 4: Simplify right side
    542,742.40x = 152,916,223,540.56
  5. Step 5: Solve for x
    x = 152,916,223,540.56/542,742.40
  6. Step 6: Final answer
    x = 281,747.33

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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.