Home / 717,910.64-990,723.18-395,632.28

Finding the Fourth Proportional to 717,910.64, 990,723.18 and 395,632.28

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Solution

The fourth proportional to 717,910.64, 990,723.18 and 395,632.28 is: 545,976.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,910.64 : 990,723.18 = 395,632.28 : x
  2. Step 2: Convert to fraction form
    717,910.64/990,723.18 = 395,632.28/x
  3. Step 3: Cross multiply
    717,910.64x = 990,723.18 × 395,632.28
  4. Step 4: Simplify right side
    717,910.64x = 391,962,070,552.25
  5. Step 5: Solve for x
    x = 391,962,070,552.25/717,910.64
  6. Step 6: Final answer
    x = 545,976.13

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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.