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Finding the Fourth Proportional to 626.61, 864.69 and 346.85

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Solution

The fourth proportional to 626.61, 864.69 and 346.85 is: 478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.61 : 864.69 = 346.85 : x
  2. Step 2: Convert to fraction form
    626.61/864.69 = 346.85/x
  3. Step 3: Cross multiply
    626.61x = 864.69 × 346.85
  4. Step 4: Simplify right side
    626.61x = 299,917.73
  5. Step 5: Solve for x
    x = 299,917.73/626.61
  6. Step 6: Final answer
    x = 478.64

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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.