Home / 1,688.06-2,532.77-865.91

Finding the Fourth Proportional to 1,688.06, 2,532.77 and 865.91

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Solution

The fourth proportional to 1,688.06, 2,532.77 and 865.91 is: 1,299.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.06 : 2,532.77 = 865.91 : x
  2. Step 2: Convert to fraction form
    1,688.06/2,532.77 = 865.91/x
  3. Step 3: Cross multiply
    1,688.06x = 2,532.77 × 865.91
  4. Step 4: Simplify right side
    1,688.06x = 2,193,133.88
  5. Step 5: Solve for x
    x = 2,193,133.88/1,688.06
  6. Step 6: Final answer
    x = 1,299.21

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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.