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Finding the Fourth Proportional to 1,240.97, 1,861.52 and 623.95

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Solution

The fourth proportional to 1,240.97, 1,861.52 and 623.95 is: 935.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.97 : 1,861.52 = 623.95 : x
  2. Step 2: Convert to fraction form
    1,240.97/1,861.52 = 623.95/x
  3. Step 3: Cross multiply
    1,240.97x = 1,861.52 × 623.95
  4. Step 4: Simplify right side
    1,240.97x = 1,161,495.40
  5. Step 5: Solve for x
    x = 1,161,495.40/1,240.97
  6. Step 6: Final answer
    x = 935.96

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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.