Home / 1,158.85-1,738.45-389.53

Finding the Fourth Proportional to 1,158.85, 1,738.45 and 389.53

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Solution

The fourth proportional to 1,158.85, 1,738.45 and 389.53 is: 584.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.85 : 1,738.45 = 389.53 : x
  2. Step 2: Convert to fraction form
    1,158.85/1,738.45 = 389.53/x
  3. Step 3: Cross multiply
    1,158.85x = 1,738.45 × 389.53
  4. Step 4: Simplify right side
    1,158.85x = 677,167.79
  5. Step 5: Solve for x
    x = 677,167.79/1,158.85
  6. Step 6: Final answer
    x = 584.35

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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.