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Finding the Fourth Proportional to 1,743.78, 2,617.02 and 649.20

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Solution

The fourth proportional to 1,743.78, 2,617.02 and 649.20 is: 974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,743.78 : 2,617.02 = 649.20 : x
  2. Step 2: Convert to fraction form
    1,743.78/2,617.02 = 649.20/x
  3. Step 3: Cross multiply
    1,743.78x = 2,617.02 × 649.20
  4. Step 4: Simplify right side
    1,743.78x = 1,698,969.38
  5. Step 5: Solve for x
    x = 1,698,969.38/1,743.78
  6. Step 6: Final answer
    x = 974.30

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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.