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Finding the Fourth Proportional to 342.27, 472.53 and 315.93

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Solution

The fourth proportional to 342.27, 472.53 and 315.93 is: 436.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.27 : 472.53 = 315.93 : x
  2. Step 2: Convert to fraction form
    342.27/472.53 = 315.93/x
  3. Step 3: Cross multiply
    342.27x = 472.53 × 315.93
  4. Step 4: Simplify right side
    342.27x = 149,286.40
  5. Step 5: Solve for x
    x = 149,286.40/342.27
  6. Step 6: Final answer
    x = 436.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.