Home / 1,415.15-2,121.69-951.78

Finding the Fourth Proportional to 1,415.15, 2,121.69 and 951.78

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Solution

The fourth proportional to 1,415.15, 2,121.69 and 951.78 is: 1,426.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.15 : 2,121.69 = 951.78 : x
  2. Step 2: Convert to fraction form
    1,415.15/2,121.69 = 951.78/x
  3. Step 3: Cross multiply
    1,415.15x = 2,121.69 × 951.78
  4. Step 4: Simplify right side
    1,415.15x = 2,019,377.72
  5. Step 5: Solve for x
    x = 2,019,377.72/1,415.15
  6. Step 6: Final answer
    x = 1,426.97

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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.