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Finding the Fourth Proportional to 1,256.77, 1,732.96 and 1,089.51

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Solution

The fourth proportional to 1,256.77, 1,732.96 and 1,089.51 is: 1,502.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.77 : 1,732.96 = 1,089.51 : x
  2. Step 2: Convert to fraction form
    1,256.77/1,732.96 = 1,089.51/x
  3. Step 3: Cross multiply
    1,256.77x = 1,732.96 × 1,089.51
  4. Step 4: Simplify right side
    1,256.77x = 1,888,077.25
  5. Step 5: Solve for x
    x = 1,888,077.25/1,256.77
  6. Step 6: Final answer
    x = 1,502.33

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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.