Home / 718,168.14-991,065.42-391,481.10

Finding the Fourth Proportional to 718,168.14, 991,065.42 and 391,481.10

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Solution

The fourth proportional to 718,168.14, 991,065.42 and 391,481.10 is: 540,240.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,168.14 : 991,065.42 = 391,481.10 : x
  2. Step 2: Convert to fraction form
    718,168.14/991,065.42 = 391,481.10/x
  3. Step 3: Cross multiply
    718,168.14x = 991,065.42 × 391,481.10
  4. Step 4: Simplify right side
    718,168.14x = 387,983,380,793.56
  5. Step 5: Solve for x
    x = 387,983,380,793.56/718,168.14
  6. Step 6: Final answer
    x = 540,240.31

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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.