Home / 1,118.92-1,544.20-621.72

Finding the Fourth Proportional to 1,118.92, 1,544.20 and 621.72

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Solution

The fourth proportional to 1,118.92, 1,544.20 and 621.72 is: 858.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.92 : 1,544.20 = 621.72 : x
  2. Step 2: Convert to fraction form
    1,118.92/1,544.20 = 621.72/x
  3. Step 3: Cross multiply
    1,118.92x = 1,544.20 × 621.72
  4. Step 4: Simplify right side
    1,118.92x = 960,060.02
  5. Step 5: Solve for x
    x = 960,060.02/1,118.92
  6. Step 6: Final answer
    x = 858.02

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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.