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Finding the Fourth Proportional to 547.16, 820.74 and 238.86

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Solution

The fourth proportional to 547.16, 820.74 and 238.86 is: 358.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.16 : 820.74 = 238.86 : x
  2. Step 2: Convert to fraction form
    547.16/820.74 = 238.86/x
  3. Step 3: Cross multiply
    547.16x = 820.74 × 238.86
  4. Step 4: Simplify right side
    547.16x = 196,041.96
  5. Step 5: Solve for x
    x = 196,041.96/547.16
  6. Step 6: Final answer
    x = 358.29

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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.