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Finding the Fourth Proportional to 2,209.68, 3,313.71 and 649.29

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Solution

The fourth proportional to 2,209.68, 3,313.71 and 649.29 is: 973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.68 : 3,313.71 = 649.29 : x
  2. Step 2: Convert to fraction form
    2,209.68/3,313.71 = 649.29/x
  3. Step 3: Cross multiply
    2,209.68x = 3,313.71 × 649.29
  4. Step 4: Simplify right side
    2,209.68x = 2,151,558.77
  5. Step 5: Solve for x
    x = 2,151,558.77/2,209.68
  6. Step 6: Final answer
    x = 973.70

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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.