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Finding the Fourth Proportional to 1,099.90, 1,648.81 and 442.18

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Solution

The fourth proportional to 1,099.90, 1,648.81 and 442.18 is: 662.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.90 : 1,648.81 = 442.18 : x
  2. Step 2: Convert to fraction form
    1,099.90/1,648.81 = 442.18/x
  3. Step 3: Cross multiply
    1,099.90x = 1,648.81 × 442.18
  4. Step 4: Simplify right side
    1,099.90x = 729,070.81
  5. Step 5: Solve for x
    x = 729,070.81/1,099.90
  6. Step 6: Final answer
    x = 662.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.