Home / 1,158.76-1,738.12-389.26

Finding the Fourth Proportional to 1,158.76, 1,738.12 and 389.26

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Solution

The fourth proportional to 1,158.76, 1,738.12 and 389.26 is: 583.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.76 : 1,738.12 = 389.26 : x
  2. Step 2: Convert to fraction form
    1,158.76/1,738.12 = 389.26/x
  3. Step 3: Cross multiply
    1,158.76x = 1,738.12 × 389.26
  4. Step 4: Simplify right side
    1,158.76x = 676,580.59
  5. Step 5: Solve for x
    x = 676,580.59/1,158.76
  6. Step 6: Final answer
    x = 583.88

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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.