Home / 1,153.20-1,587.96-1,089.12

Finding the Fourth Proportional to 1,153.20, 1,587.96 and 1,089.12

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Solution

The fourth proportional to 1,153.20, 1,587.96 and 1,089.12 is: 1,499.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.20 : 1,587.96 = 1,089.12 : x
  2. Step 2: Convert to fraction form
    1,153.20/1,587.96 = 1,089.12/x
  3. Step 3: Cross multiply
    1,153.20x = 1,587.96 × 1,089.12
  4. Step 4: Simplify right side
    1,153.20x = 1,729,479.00
  5. Step 5: Solve for x
    x = 1,729,479.00/1,153.20
  6. Step 6: Final answer
    x = 1,499.72

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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.