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Finding the Fourth Proportional to 1,259.49, 1,737.84 and 762.15

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Solution

The fourth proportional to 1,259.49, 1,737.84 and 762.15 is: 1,051.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259.49 : 1,737.84 = 762.15 : x
  2. Step 2: Convert to fraction form
    1,259.49/1,737.84 = 762.15/x
  3. Step 3: Cross multiply
    1,259.49x = 1,737.84 × 762.15
  4. Step 4: Simplify right side
    1,259.49x = 1,324,494.76
  5. Step 5: Solve for x
    x = 1,324,494.76/1,259.49
  6. Step 6: Final answer
    x = 1,051.61

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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.