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Finding the Fourth Proportional to 916.14, 1,372.16 and 550.18

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Solution

The fourth proportional to 916.14, 1,372.16 and 550.18 is: 824.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.14 : 1,372.16 = 550.18 : x
  2. Step 2: Convert to fraction form
    916.14/1,372.16 = 550.18/x
  3. Step 3: Cross multiply
    916.14x = 1,372.16 × 550.18
  4. Step 4: Simplify right side
    916.14x = 754,927.27
  5. Step 5: Solve for x
    x = 754,927.27/916.14
  6. Step 6: Final answer
    x = 824.03

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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.