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Finding the Fourth Proportional to 458,082.80, 687,124.20 and 192,143.60

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Solution

The fourth proportional to 458,082.80, 687,124.20 and 192,143.60 is: 288,215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,082.80 : 687,124.20 = 192,143.60 : x
  2. Step 2: Convert to fraction form
    458,082.80/687,124.20 = 192,143.60/x
  3. Step 3: Cross multiply
    458,082.80x = 687,124.20 × 192,143.60
  4. Step 4: Simplify right side
    458,082.80x = 132,026,517,435.12
  5. Step 5: Solve for x
    x = 132,026,517,435.12/458,082.80
  6. Step 6: Final answer
    x = 288,215.40

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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.