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Finding the Fourth Proportional to 1,255.68, 1,728 and 1,066.32

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Solution

The fourth proportional to 1,255.68, 1,728 and 1,066.32 is: 1,467.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.68 : 1,728 = 1,066.32 : x
  2. Step 2: Convert to fraction form
    1,255.68/1,728 = 1,066.32/x
  3. Step 3: Cross multiply
    1,255.68x = 1,728 × 1,066.32
  4. Step 4: Simplify right side
    1,255.68x = 1,842,600.96
  5. Step 5: Solve for x
    x = 1,842,600.96/1,255.68
  6. Step 6: Final answer
    x = 1,467.41

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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.