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Finding the Fourth Proportional to 1,098.50, 1,648.30 and 550.74

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Solution

The fourth proportional to 1,098.50, 1,648.30 and 550.74 is: 826.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.50 : 1,648.30 = 550.74 : x
  2. Step 2: Convert to fraction form
    1,098.50/1,648.30 = 550.74/x
  3. Step 3: Cross multiply
    1,098.50x = 1,648.30 × 550.74
  4. Step 4: Simplify right side
    1,098.50x = 907,784.74
  5. Step 5: Solve for x
    x = 907,784.74/1,098.50
  6. Step 6: Final answer
    x = 826.39

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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.