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Finding the Fourth Proportional to 721,853.32, 995,913.54 and 415,921.78

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Solution

The fourth proportional to 721,853.32, 995,913.54 and 415,921.78 is: 573,831.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,853.32 : 995,913.54 = 415,921.78 : x
  2. Step 2: Convert to fraction form
    721,853.32/995,913.54 = 415,921.78/x
  3. Step 3: Cross multiply
    721,853.32x = 995,913.54 × 415,921.78
  4. Step 4: Simplify right side
    721,853.32x = 414,222,132,282.90
  5. Step 5: Solve for x
    x = 414,222,132,282.90/721,853.32
  6. Step 6: Final answer
    x = 573,831.44

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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.