Home / 2,626.64-3,939.20-777.72

Finding the Fourth Proportional to 2,626.64, 3,939.20 and 777.72

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Solution

The fourth proportional to 2,626.64, 3,939.20 and 777.72 is: 1,166.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,626.64 : 3,939.20 = 777.72 : x
  2. Step 2: Convert to fraction form
    2,626.64/3,939.20 = 777.72/x
  3. Step 3: Cross multiply
    2,626.64x = 3,939.20 × 777.72
  4. Step 4: Simplify right side
    2,626.64x = 3,063,590.74
  5. Step 5: Solve for x
    x = 3,063,590.74/2,626.64
  6. Step 6: Final answer
    x = 1,166.36

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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.