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Finding the Fourth Proportional to 916.36, 1,375.44 and 672.19

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Solution

The fourth proportional to 916.36, 1,375.44 and 672.19 is: 1,008.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.36 : 1,375.44 = 672.19 : x
  2. Step 2: Convert to fraction form
    916.36/1,375.44 = 672.19/x
  3. Step 3: Cross multiply
    916.36x = 1,375.44 × 672.19
  4. Step 4: Simplify right side
    916.36x = 924,557.01
  5. Step 5: Solve for x
    x = 924,557.01/916.36
  6. Step 6: Final answer
    x = 1,008.95

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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.