Home / 721,727.81-995,880.12-399,437.15

Finding the Fourth Proportional to 721,727.81, 995,880.12 and 399,437.15

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Solution

The fourth proportional to 721,727.81, 995,880.12 and 399,437.15 is: 551,165.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,727.81 : 995,880.12 = 399,437.15 : x
  2. Step 2: Convert to fraction form
    721,727.81/995,880.12 = 399,437.15/x
  3. Step 3: Cross multiply
    721,727.81x = 995,880.12 × 399,437.15
  4. Step 4: Simplify right side
    721,727.81x = 397,791,511,895.06
  5. Step 5: Solve for x
    x = 397,791,511,895.06/721,727.81
  6. Step 6: Final answer
    x = 551,165.56

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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.