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Finding the Fourth Proportional to 660,542.72, 911,712.12 and 374,231.48

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Solution

The fourth proportional to 660,542.72, 911,712.12 and 374,231.48 is: 516,531.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,542.72 : 911,712.12 = 374,231.48 : x
  2. Step 2: Convert to fraction form
    660,542.72/911,712.12 = 374,231.48/x
  3. Step 3: Cross multiply
    660,542.72x = 911,712.12 × 374,231.48
  4. Step 4: Simplify right side
    660,542.72x = 341,191,376,001.54
  5. Step 5: Solve for x
    x = 341,191,376,001.54/660,542.72
  6. Step 6: Final answer
    x = 516,531.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.