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Finding the Fourth Proportional to 611.25, 916.21 and 264.74

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Solution

The fourth proportional to 611.25, 916.21 and 264.74 is: 396.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.25 : 916.21 = 264.74 : x
  2. Step 2: Convert to fraction form
    611.25/916.21 = 264.74/x
  3. Step 3: Cross multiply
    611.25x = 916.21 × 264.74
  4. Step 4: Simplify right side
    611.25x = 242,556.11
  5. Step 5: Solve for x
    x = 242,556.11/611.25
  6. Step 6: Final answer
    x = 396.82

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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.