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Finding the Fourth Proportional to 415.80, 626.55 and 348.84

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Solution

The fourth proportional to 415.80, 626.55 and 348.84 is: 525.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.80 : 626.55 = 348.84 : x
  2. Step 2: Convert to fraction form
    415.80/626.55 = 348.84/x
  3. Step 3: Cross multiply
    415.80x = 626.55 × 348.84
  4. Step 4: Simplify right side
    415.80x = 218,565.70
  5. Step 5: Solve for x
    x = 218,565.70/415.80
  6. Step 6: Final answer
    x = 525.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.