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Finding the Fourth Proportional to 614.83, 921.23 and 511.55

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Solution

The fourth proportional to 614.83, 921.23 and 511.55 is: 766.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.83 : 921.23 = 511.55 : x
  2. Step 2: Convert to fraction form
    614.83/921.23 = 511.55/x
  3. Step 3: Cross multiply
    614.83x = 921.23 × 511.55
  4. Step 4: Simplify right side
    614.83x = 471,252.65
  5. Step 5: Solve for x
    x = 471,252.65/614.83
  6. Step 6: Final answer
    x = 766.48

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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.