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Finding the Fourth Proportional to 1,344.69, 2,000.76 and 1,311.21

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Solution

The fourth proportional to 1,344.69, 2,000.76 and 1,311.21 is: 1,950.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.69 : 2,000.76 = 1,311.21 : x
  2. Step 2: Convert to fraction form
    1,344.69/2,000.76 = 1,311.21/x
  3. Step 3: Cross multiply
    1,344.69x = 2,000.76 × 1,311.21
  4. Step 4: Simplify right side
    1,344.69x = 2,623,416.52
  5. Step 5: Solve for x
    x = 2,623,416.52/1,344.69
  6. Step 6: Final answer
    x = 1,950.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.