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Finding the Fourth Proportional to 1,275.46, 1,760.79 and 751.66

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Solution

The fourth proportional to 1,275.46, 1,760.79 and 751.66 is: 1,037.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.46 : 1,760.79 = 751.66 : x
  2. Step 2: Convert to fraction form
    1,275.46/1,760.79 = 751.66/x
  3. Step 3: Cross multiply
    1,275.46x = 1,760.79 × 751.66
  4. Step 4: Simplify right side
    1,275.46x = 1,323,515.41
  5. Step 5: Solve for x
    x = 1,323,515.41/1,275.46
  6. Step 6: Final answer
    x = 1,037.68

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1.5x scale

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.