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Finding the Fourth Proportional to 1,490.85, 2,237.72 and 760.95

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Solution

The fourth proportional to 1,490.85, 2,237.72 and 760.95 is: 1,142.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.85 : 2,237.72 = 760.95 : x
  2. Step 2: Convert to fraction form
    1,490.85/2,237.72 = 760.95/x
  3. Step 3: Cross multiply
    1,490.85x = 2,237.72 × 760.95
  4. Step 4: Simplify right side
    1,490.85x = 1,702,789.23
  5. Step 5: Solve for x
    x = 1,702,789.23/1,490.85
  6. Step 6: Final answer
    x = 1,142.16

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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.