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Finding the Fourth Proportional to 1,098.14, 1,647.20 and 276.41

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Solution

The fourth proportional to 1,098.14, 1,647.20 and 276.41 is: 414.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.14 : 1,647.20 = 276.41 : x
  2. Step 2: Convert to fraction form
    1,098.14/1,647.20 = 276.41/x
  3. Step 3: Cross multiply
    1,098.14x = 1,647.20 × 276.41
  4. Step 4: Simplify right side
    1,098.14x = 455,307.36
  5. Step 5: Solve for x
    x = 455,307.36/1,098.14
  6. Step 6: Final answer
    x = 414.62

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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.