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Finding the Fourth Proportional to 1,254.71, 1,731.40 and 695.20

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Solution

The fourth proportional to 1,254.71, 1,731.40 and 695.20 is: 959.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.71 : 1,731.40 = 695.20 : x
  2. Step 2: Convert to fraction form
    1,254.71/1,731.40 = 695.20/x
  3. Step 3: Cross multiply
    1,254.71x = 1,731.40 × 695.20
  4. Step 4: Simplify right side
    1,254.71x = 1,203,676.53
  5. Step 5: Solve for x
    x = 1,203,676.53/1,254.71
  6. Step 6: Final answer
    x = 959.33

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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.