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Finding the Fourth Proportional to 547.65, 820.71 and 392.67

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Solution

The fourth proportional to 547.65, 820.71 and 392.67 is: 588.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.65 : 820.71 = 392.67 : x
  2. Step 2: Convert to fraction form
    547.65/820.71 = 392.67/x
  3. Step 3: Cross multiply
    547.65x = 820.71 × 392.67
  4. Step 4: Simplify right side
    547.65x = 322,268.20
  5. Step 5: Solve for x
    x = 322,268.20/547.65
  6. Step 6: Final answer
    x = 588.46

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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.