Home / 717,552.16-990,217.38-395,254.78

Finding the Fourth Proportional to 717,552.16, 990,217.38 and 395,254.78

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Solution

The fourth proportional to 717,552.16, 990,217.38 and 395,254.78 is: 545,449.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,552.16 : 990,217.38 = 395,254.78 : x
  2. Step 2: Convert to fraction form
    717,552.16/990,217.38 = 395,254.78/x
  3. Step 3: Cross multiply
    717,552.16x = 990,217.38 × 395,254.78
  4. Step 4: Simplify right side
    717,552.16x = 391,388,152,684.08
  5. Step 5: Solve for x
    x = 391,388,152,684.08/717,552.16
  6. Step 6: Final answer
    x = 545,449.06

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Double scale
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Similar ratio
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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.