Home / 1,126.55-1,687.80-1,058.78

Finding the Fourth Proportional to 1,126.55, 1,687.80 and 1,058.78

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Solution

The fourth proportional to 1,126.55, 1,687.80 and 1,058.78 is: 1,586.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.55 : 1,687.80 = 1,058.78 : x
  2. Step 2: Convert to fraction form
    1,126.55/1,687.80 = 1,058.78/x
  3. Step 3: Cross multiply
    1,126.55x = 1,687.80 × 1,058.78
  4. Step 4: Simplify right side
    1,126.55x = 1,787,008.88
  5. Step 5: Solve for x
    x = 1,787,008.88/1,126.55
  6. Step 6: Final answer
    x = 1,586.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.