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Finding the Fourth Proportional to 458,520.95, 687,811.80 and 121,556.90

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Solution

The fourth proportional to 458,520.95, 687,811.80 and 121,556.90 is: 182,343.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,520.95 : 687,811.80 = 121,556.90 : x
  2. Step 2: Convert to fraction form
    458,520.95/687,811.80 = 121,556.90/x
  3. Step 3: Cross multiply
    458,520.95x = 687,811.80 × 121,556.90
  4. Step 4: Simplify right side
    458,520.95x = 83,608,270,191.42
  5. Step 5: Solve for x
    x = 83,608,270,191.42/458,520.95
  6. Step 6: Final answer
    x = 182,343.40

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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.