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Finding the Fourth Proportional to 1,098.85, 1,648.40 and 368.49

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Solution

The fourth proportional to 1,098.85, 1,648.40 and 368.49 is: 552.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.85 : 1,648.40 = 368.49 : x
  2. Step 2: Convert to fraction form
    1,098.85/1,648.40 = 368.49/x
  3. Step 3: Cross multiply
    1,098.85x = 1,648.40 × 368.49
  4. Step 4: Simplify right side
    1,098.85x = 607,418.92
  5. Step 5: Solve for x
    x = 607,418.92/1,098.85
  6. Step 6: Final answer
    x = 552.78

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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.