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Finding the Fourth Proportional to 713,882.20, 985,184.76 and 391,605.88

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Solution

The fourth proportional to 713,882.20, 985,184.76 and 391,605.88 is: 540,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,882.20 : 985,184.76 = 391,605.88 : x
  2. Step 2: Convert to fraction form
    713,882.20/985,184.76 = 391,605.88/x
  3. Step 3: Cross multiply
    713,882.20x = 985,184.76 × 391,605.88
  4. Step 4: Simplify right side
    713,882.20x = 385,804,144,902.39
  5. Step 5: Solve for x
    x = 385,804,144,902.39/713,882.20
  6. Step 6: Final answer
    x = 540,431.10

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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.