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Finding the Fourth Proportional to 721,089.66, 995,097.35 and 398,792.82

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Solution

The fourth proportional to 721,089.66, 995,097.35 and 398,792.82 is: 550,330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,089.66 : 995,097.35 = 398,792.82 : x
  2. Step 2: Convert to fraction form
    721,089.66/995,097.35 = 398,792.82/x
  3. Step 3: Cross multiply
    721,089.66x = 995,097.35 × 398,792.82
  4. Step 4: Simplify right side
    721,089.66x = 396,837,676,387.06
  5. Step 5: Solve for x
    x = 396,837,676,387.06/721,089.66
  6. Step 6: Final answer
    x = 550,330.56

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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.