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Finding the Fourth Proportional to 1,311.59, 1,810.04 and 752.12

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Solution

The fourth proportional to 1,311.59, 1,810.04 and 752.12 is: 1,037.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.59 : 1,810.04 = 752.12 : x
  2. Step 2: Convert to fraction form
    1,311.59/1,810.04 = 752.12/x
  3. Step 3: Cross multiply
    1,311.59x = 1,810.04 × 752.12
  4. Step 4: Simplify right side
    1,311.59x = 1,361,354.47
  5. Step 5: Solve for x
    x = 1,361,354.47/1,311.59
  6. Step 6: Final answer
    x = 1,037.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.