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Finding the Fourth Proportional to 438,689.90, 605,380.92 and 245,099.10

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Solution

The fourth proportional to 438,689.90, 605,380.92 and 245,099.10 is: 338,230.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,689.90 : 605,380.92 = 245,099.10 : x
  2. Step 2: Convert to fraction form
    438,689.90/605,380.92 = 245,099.10/x
  3. Step 3: Cross multiply
    438,689.90x = 605,380.92 × 245,099.10
  4. Step 4: Simplify right side
    438,689.90x = 148,378,318,649.17
  5. Step 5: Solve for x
    x = 148,378,318,649.17/438,689.90
  6. Step 6: Final answer
    x = 338,230.53

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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.