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Finding the Fourth Proportional to 611.81, 916.84 and 264.88

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Solution

The fourth proportional to 611.81, 916.84 and 264.88 is: 396.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.81 : 916.84 = 264.88 : x
  2. Step 2: Convert to fraction form
    611.81/916.84 = 264.88/x
  3. Step 3: Cross multiply
    611.81x = 916.84 × 264.88
  4. Step 4: Simplify right side
    611.81x = 242,852.58
  5. Step 5: Solve for x
    x = 242,852.58/611.81
  6. Step 6: Final answer
    x = 396.94

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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.