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Finding the Fourth Proportional to 247.01, 340.74 and 153.72

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Solution

The fourth proportional to 247.01, 340.74 and 153.72 is: 212.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.01 : 340.74 = 153.72 : x
  2. Step 2: Convert to fraction form
    247.01/340.74 = 153.72/x
  3. Step 3: Cross multiply
    247.01x = 340.74 × 153.72
  4. Step 4: Simplify right side
    247.01x = 52,378.55
  5. Step 5: Solve for x
    x = 52,378.55/247.01
  6. Step 6: Final answer
    x = 212.05

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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.