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Finding the Fourth Proportional to 614.56, 920.92 and 511.58

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Solution

The fourth proportional to 614.56, 920.92 and 511.58 is: 766.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.56 : 920.92 = 511.58 : x
  2. Step 2: Convert to fraction form
    614.56/920.92 = 511.58/x
  3. Step 3: Cross multiply
    614.56x = 920.92 × 511.58
  4. Step 4: Simplify right side
    614.56x = 471,124.25
  5. Step 5: Solve for x
    x = 471,124.25/614.56
  6. Step 6: Final answer
    x = 766.60

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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.