Home / 1,686.26-2,529.98-865.15

Finding the Fourth Proportional to 1,686.26, 2,529.98 and 865.15

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Solution

The fourth proportional to 1,686.26, 2,529.98 and 865.15 is: 1,298.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.26 : 2,529.98 = 865.15 : x
  2. Step 2: Convert to fraction form
    1,686.26/2,529.98 = 865.15/x
  3. Step 3: Cross multiply
    1,686.26x = 2,529.98 × 865.15
  4. Step 4: Simplify right side
    1,686.26x = 2,188,812.20
  5. Step 5: Solve for x
    x = 2,188,812.20/1,686.26
  6. Step 6: Final answer
    x = 1,298.03

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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.