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Finding the Fourth Proportional to 2,188.60, 3,281.92 and 649.24

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Solution

The fourth proportional to 2,188.60, 3,281.92 and 649.24 is: 973.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.60 : 3,281.92 = 649.24 : x
  2. Step 2: Convert to fraction form
    2,188.60/3,281.92 = 649.24/x
  3. Step 3: Cross multiply
    2,188.60x = 3,281.92 × 649.24
  4. Step 4: Simplify right side
    2,188.60x = 2,130,753.74
  5. Step 5: Solve for x
    x = 2,130,753.74/2,188.60
  6. Step 6: Final answer
    x = 973.57

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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.