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Finding the Fourth Proportional to 1,244.00, 1,862.03 and 782.30

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Solution

The fourth proportional to 1,244.00, 1,862.03 and 782.30 is: 1,170.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.00 : 1,862.03 = 782.30 : x
  2. Step 2: Convert to fraction form
    1,244.00/1,862.03 = 782.30/x
  3. Step 3: Cross multiply
    1,244.00x = 1,862.03 × 782.30
  4. Step 4: Simplify right side
    1,244.00x = 1,456,652.85
  5. Step 5: Solve for x
    x = 1,456,652.85/1,244.00
  6. Step 6: Final answer
    x = 1,170.95

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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.