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Finding the Fourth Proportional to 438,686.90, 605,376.78 and 245,096.10

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Solution

The fourth proportional to 438,686.90, 605,376.78 and 245,096.10 is: 338,226.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,686.90 : 605,376.78 = 245,096.10 : x
  2. Step 2: Convert to fraction form
    438,686.90/605,376.78 = 245,096.10/x
  3. Step 3: Cross multiply
    438,686.90x = 605,376.78 × 245,096.10
  4. Step 4: Simplify right side
    438,686.90x = 148,375,487,808.56
  5. Step 5: Solve for x
    x = 148,375,487,808.56/438,686.90
  6. Step 6: Final answer
    x = 338,226.39

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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.