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Finding the Fourth Proportional to 391,599.97, 540,398.19 and 217,169.16

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Solution

The fourth proportional to 391,599.97, 540,398.19 and 217,169.16 is: 299,688.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,599.97 : 540,398.19 = 217,169.16 : x
  2. Step 2: Convert to fraction form
    391,599.97/540,398.19 = 217,169.16/x
  3. Step 3: Cross multiply
    391,599.97x = 540,398.19 × 217,169.16
  4. Step 4: Simplify right side
    391,599.97x = 117,357,818,554.14
  5. Step 5: Solve for x
    x = 117,357,818,554.14/391,599.97
  6. Step 6: Final answer
    x = 299,688.02

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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.