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Finding the Fourth Proportional to 622.47, 934.47 and 348.78

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Solution

The fourth proportional to 622.47, 934.47 and 348.78 is: 523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.47 : 934.47 = 348.78 : x
  2. Step 2: Convert to fraction form
    622.47/934.47 = 348.78/x
  3. Step 3: Cross multiply
    622.47x = 934.47 × 348.78
  4. Step 4: Simplify right side
    622.47x = 325,924.45
  5. Step 5: Solve for x
    x = 325,924.45/622.47
  6. Step 6: Final answer
    x = 523.60

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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.