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Finding the Fourth Proportional to 677.32, 934.70 and 378.56

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Solution

The fourth proportional to 677.32, 934.70 and 378.56 is: 522.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.32 : 934.70 = 378.56 : x
  2. Step 2: Convert to fraction form
    677.32/934.70 = 378.56/x
  3. Step 3: Cross multiply
    677.32x = 934.70 × 378.56
  4. Step 4: Simplify right side
    677.32x = 353,840.03
  5. Step 5: Solve for x
    x = 353,840.03/677.32
  6. Step 6: Final answer
    x = 522.41

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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.