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Finding the Fourth Proportional to 347.09, 520.71 and 154.72

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Solution

The fourth proportional to 347.09, 520.71 and 154.72 is: 232.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.09 : 520.71 = 154.72 : x
  2. Step 2: Convert to fraction form
    347.09/520.71 = 154.72/x
  3. Step 3: Cross multiply
    347.09x = 520.71 × 154.72
  4. Step 4: Simplify right side
    347.09x = 80,561.65
  5. Step 5: Solve for x
    x = 80,561.65/347.09
  6. Step 6: Final answer
    x = 232.11

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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.