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Finding the Fourth Proportional to 438,687.90, 605,378.16 and 245,097.10

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Solution

The fourth proportional to 438,687.90, 605,378.16 and 245,097.10 is: 338,227.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,687.90 : 605,378.16 = 245,097.10 : x
  2. Step 2: Convert to fraction form
    438,687.90/605,378.16 = 245,097.10/x
  3. Step 3: Cross multiply
    438,687.90x = 605,378.16 × 245,097.10
  4. Step 4: Simplify right side
    438,687.90x = 148,376,431,419.34
  5. Step 5: Solve for x
    x = 148,376,431,419.34/438,687.90
  6. Step 6: Final answer
    x = 338,227.77

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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.