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Finding the Fourth Proportional to 290,432.20, 435,648.30 and 267,687.40

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Solution

The fourth proportional to 290,432.20, 435,648.30 and 267,687.40 is: 401,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,432.20 : 435,648.30 = 267,687.40 : x
  2. Step 2: Convert to fraction form
    290,432.20/435,648.30 = 267,687.40/x
  3. Step 3: Cross multiply
    290,432.20x = 435,648.30 × 267,687.40
  4. Step 4: Simplify right side
    290,432.20x = 116,617,560,741.42
  5. Step 5: Solve for x
    x = 116,617,560,741.42/290,432.20
  6. Step 6: Final answer
    x = 401,531.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.