Home / 3,587.69-5,378.28-1,278.65

Finding the Fourth Proportional to 3,587.69, 5,378.28 and 1,278.65

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Solution

The fourth proportional to 3,587.69, 5,378.28 and 1,278.65 is: 1,916.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.69 : 5,378.28 = 1,278.65 : x
  2. Step 2: Convert to fraction form
    3,587.69/5,378.28 = 1,278.65/x
  3. Step 3: Cross multiply
    3,587.69x = 5,378.28 × 1,278.65
  4. Step 4: Simplify right side
    3,587.69x = 6,876,937.72
  5. Step 5: Solve for x
    x = 6,876,937.72/3,587.69
  6. Step 6: Final answer
    x = 1,916.81

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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.