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Finding the Fourth Proportional to 611.19, 916.79 and 369.27

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Solution

The fourth proportional to 611.19, 916.79 and 369.27 is: 553.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.19 : 916.79 = 369.27 : x
  2. Step 2: Convert to fraction form
    611.19/916.79 = 369.27/x
  3. Step 3: Cross multiply
    611.19x = 916.79 × 369.27
  4. Step 4: Simplify right side
    611.19x = 338,541.20
  5. Step 5: Solve for x
    x = 338,541.20/611.19
  6. Step 6: Final answer
    x = 553.91

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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.