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Finding the Fourth Proportional to 623.44, 934.34 and 257.72

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Solution

The fourth proportional to 623.44, 934.34 and 257.72 is: 386.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.44 : 934.34 = 257.72 : x
  2. Step 2: Convert to fraction form
    623.44/934.34 = 257.72/x
  3. Step 3: Cross multiply
    623.44x = 934.34 × 257.72
  4. Step 4: Simplify right side
    623.44x = 240,799.15
  5. Step 5: Solve for x
    x = 240,799.15/623.44
  6. Step 6: Final answer
    x = 386.24

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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.