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Finding the Fourth Proportional to 1,255.34, 1,732.34 and 695.80

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Solution

The fourth proportional to 1,255.34, 1,732.34 and 695.80 is: 960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.34 : 1,732.34 = 695.80 : x
  2. Step 2: Convert to fraction form
    1,255.34/1,732.34 = 695.80/x
  3. Step 3: Cross multiply
    1,255.34x = 1,732.34 × 695.80
  4. Step 4: Simplify right side
    1,255.34x = 1,205,368.24
  5. Step 5: Solve for x
    x = 1,205,368.24/1,255.34
  6. Step 6: Final answer
    x = 960.20

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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.