Home / 721,639.16-995,837.52-399,362.84

Finding the Fourth Proportional to 721,639.16, 995,837.52 and 399,362.84

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Solution

The fourth proportional to 721,639.16, 995,837.52 and 399,362.84 is: 551,107.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,639.16 : 995,837.52 = 399,362.84 : x
  2. Step 2: Convert to fraction form
    721,639.16/995,837.52 = 399,362.84/x
  3. Step 3: Cross multiply
    721,639.16x = 995,837.52 × 399,362.84
  4. Step 4: Simplify right side
    721,639.16x = 397,700,500,165.76
  5. Step 5: Solve for x
    x = 397,700,500,165.76/721,639.16
  6. Step 6: Final answer
    x = 551,107.15

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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.