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Finding the Fourth Proportional to 1,255.21, 1,732.10 and 695.63

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Solution

The fourth proportional to 1,255.21, 1,732.10 and 695.63 is: 959.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.21 : 1,732.10 = 695.63 : x
  2. Step 2: Convert to fraction form
    1,255.21/1,732.10 = 695.63/x
  3. Step 3: Cross multiply
    1,255.21x = 1,732.10 × 695.63
  4. Step 4: Simplify right side
    1,255.21x = 1,204,906.79
  5. Step 5: Solve for x
    x = 1,204,906.79/1,255.21
  6. Step 6: Final answer
    x = 959.93

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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.