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Finding the Fourth Proportional to 1,254.54, 1,731.19 and 687.26

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Solution

The fourth proportional to 1,254.54, 1,731.19 and 687.26 is: 948.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.54 : 1,731.19 = 687.26 : x
  2. Step 2: Convert to fraction form
    1,254.54/1,731.19 = 687.26/x
  3. Step 3: Cross multiply
    1,254.54x = 1,731.19 × 687.26
  4. Step 4: Simplify right side
    1,254.54x = 1,189,777.64
  5. Step 5: Solve for x
    x = 1,189,777.64/1,254.54
  6. Step 6: Final answer
    x = 948.38

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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.