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Finding the Fourth Proportional to 611.96, 916.30 and 514.76

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Solution

The fourth proportional to 611.96, 916.30 and 514.76 is: 770.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.96 : 916.30 = 514.76 : x
  2. Step 2: Convert to fraction form
    611.96/916.30 = 514.76/x
  3. Step 3: Cross multiply
    611.96x = 916.30 × 514.76
  4. Step 4: Simplify right side
    611.96x = 471,674.59
  5. Step 5: Solve for x
    x = 471,674.59/611.96
  6. Step 6: Final answer
    x = 770.76

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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.