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Finding the Fourth Proportional to 1,765.70, 2,648.48 and 449.46

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Solution

The fourth proportional to 1,765.70, 2,648.48 and 449.46 is: 674.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.70 : 2,648.48 = 449.46 : x
  2. Step 2: Convert to fraction form
    1,765.70/2,648.48 = 449.46/x
  3. Step 3: Cross multiply
    1,765.70x = 2,648.48 × 449.46
  4. Step 4: Simplify right side
    1,765.70x = 1,190,385.82
  5. Step 5: Solve for x
    x = 1,190,385.82/1,765.70
  6. Step 6: Final answer
    x = 674.17

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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.