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Finding the Fourth Proportional to 247.21, 370.66 and 117.13

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Solution

The fourth proportional to 247.21, 370.66 and 117.13 is: 175.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.21 : 370.66 = 117.13 : x
  2. Step 2: Convert to fraction form
    247.21/370.66 = 117.13/x
  3. Step 3: Cross multiply
    247.21x = 370.66 × 117.13
  4. Step 4: Simplify right side
    247.21x = 43,415.11
  5. Step 5: Solve for x
    x = 43,415.11/247.21
  6. Step 6: Final answer
    x = 175.62

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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.