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Finding the Fourth Proportional to 290,626.20, 435,939.30 and 268,974.90

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Solution

The fourth proportional to 290,626.20, 435,939.30 and 268,974.90 is: 403,462.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,626.20 : 435,939.30 = 268,974.90 : x
  2. Step 2: Convert to fraction form
    290,626.20/435,939.30 = 268,974.90/x
  3. Step 3: Cross multiply
    290,626.20x = 435,939.30 × 268,974.90
  4. Step 4: Simplify right side
    290,626.20x = 117,256,729,623.57
  5. Step 5: Solve for x
    x = 117,256,729,623.57/290,626.20
  6. Step 6: Final answer
    x = 403,462.35

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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.