Home / 1,688.24-2,532.26-648.20

Finding the Fourth Proportional to 1,688.24, 2,532.26 and 648.20

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Solution

The fourth proportional to 1,688.24, 2,532.26 and 648.20 is: 972.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.24 : 2,532.26 = 648.20 : x
  2. Step 2: Convert to fraction form
    1,688.24/2,532.26 = 648.20/x
  3. Step 3: Cross multiply
    1,688.24x = 2,532.26 × 648.20
  4. Step 4: Simplify right side
    1,688.24x = 1,641,418.88
  5. Step 5: Solve for x
    x = 1,641,418.88/1,688.24
  6. Step 6: Final answer
    x = 972.26

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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.