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Finding the Fourth Proportional to 721,241.80, 995,301.39 and 398,951.63

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Solution

The fourth proportional to 721,241.80, 995,301.39 and 398,951.63 is: 550,546.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,241.80 : 995,301.39 = 398,951.63 : x
  2. Step 2: Convert to fraction form
    721,241.80/995,301.39 = 398,951.63/x
  3. Step 3: Cross multiply
    721,241.80x = 995,301.39 × 398,951.63
  4. Step 4: Simplify right side
    721,241.80x = 397,077,111,881.77
  5. Step 5: Solve for x
    x = 397,077,111,881.77/721,241.80
  6. Step 6: Final answer
    x = 550,546.45

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Double scale
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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.