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Finding the Fourth Proportional to 718,910.30, 992,096.30 and 396,621.16

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Solution

The fourth proportional to 718,910.30, 992,096.30 and 396,621.16 is: 547,337.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,910.30 : 992,096.30 = 396,621.16 : x
  2. Step 2: Convert to fraction form
    718,910.30/992,096.30 = 396,621.16/x
  3. Step 3: Cross multiply
    718,910.30x = 992,096.30 × 396,621.16
  4. Step 4: Simplify right side
    718,910.30x = 393,486,385,337.71
  5. Step 5: Solve for x
    x = 393,486,385,337.71/718,910.30
  6. Step 6: Final answer
    x = 547,337.25

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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.