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Finding the Fourth Proportional to 247.23, 370.81 and 155.65

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Solution

The fourth proportional to 247.23, 370.81 and 155.65 is: 233.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.23 : 370.81 = 155.65 : x
  2. Step 2: Convert to fraction form
    247.23/370.81 = 155.65/x
  3. Step 3: Cross multiply
    247.23x = 370.81 × 155.65
  4. Step 4: Simplify right side
    247.23x = 57,715.26
  5. Step 5: Solve for x
    x = 57,715.26/247.23
  6. Step 6: Final answer
    x = 233.45

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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.