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Finding the Fourth Proportional to 916.75, 1,373.95 and 448.44

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Solution

The fourth proportional to 916.75, 1,373.95 and 448.44 is: 672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.75 : 1,373.95 = 448.44 : x
  2. Step 2: Convert to fraction form
    916.75/1,373.95 = 448.44/x
  3. Step 3: Cross multiply
    916.75x = 1,373.95 × 448.44
  4. Step 4: Simplify right side
    916.75x = 616,134.14
  5. Step 5: Solve for x
    x = 616,134.14/916.75
  6. Step 6: Final answer
    x = 672.09

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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.