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Finding the Fourth Proportional to 1,098.40, 1,646.16 and 448.39

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Solution

The fourth proportional to 1,098.40, 1,646.16 and 448.39 is: 672.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.40 : 1,646.16 = 448.39 : x
  2. Step 2: Convert to fraction form
    1,098.40/1,646.16 = 448.39/x
  3. Step 3: Cross multiply
    1,098.40x = 1,646.16 × 448.39
  4. Step 4: Simplify right side
    1,098.40x = 738,121.68
  5. Step 5: Solve for x
    x = 738,121.68/1,098.40
  6. Step 6: Final answer
    x = 672.00

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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.