Home / 1,585.90-2,375.85-1,378.12

Finding the Fourth Proportional to 1,585.90, 2,375.85 and 1,378.12

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Solution

The fourth proportional to 1,585.90, 2,375.85 and 1,378.12 is: 2,064.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.90 : 2,375.85 = 1,378.12 : x
  2. Step 2: Convert to fraction form
    1,585.90/2,375.85 = 1,378.12/x
  3. Step 3: Cross multiply
    1,585.90x = 2,375.85 × 1,378.12
  4. Step 4: Simplify right side
    1,585.90x = 3,274,206.40
  5. Step 5: Solve for x
    x = 3,274,206.40/1,585.90
  6. Step 6: Final answer
    x = 2,064.57

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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.