Home / 5,174.35-7,761.63-1,278.79

Finding the Fourth Proportional to 5,174.35, 7,761.63 and 1,278.79

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Solution

The fourth proportional to 5,174.35, 7,761.63 and 1,278.79 is: 1,918.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,174.35 : 7,761.63 = 1,278.79 : x
  2. Step 2: Convert to fraction form
    5,174.35/7,761.63 = 1,278.79/x
  3. Step 3: Cross multiply
    5,174.35x = 7,761.63 × 1,278.79
  4. Step 4: Simplify right side
    5,174.35x = 9,925,494.83
  5. Step 5: Solve for x
    x = 9,925,494.83/5,174.35
  6. Step 6: Final answer
    x = 1,918.21

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1.5x scale

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.