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Finding the Fourth Proportional to 342.25, 511.04 and 281.23

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Solution

The fourth proportional to 342.25, 511.04 and 281.23 is: 419.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.25 : 511.04 = 281.23 : x
  2. Step 2: Convert to fraction form
    342.25/511.04 = 281.23/x
  3. Step 3: Cross multiply
    342.25x = 511.04 × 281.23
  4. Step 4: Simplify right side
    342.25x = 143,719.78
  5. Step 5: Solve for x
    x = 143,719.78/342.25
  6. Step 6: Final answer
    x = 419.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.