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Finding the Fourth Proportional to 623.69, 934.38 and 425.94

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Solution

The fourth proportional to 623.69, 934.38 and 425.94 is: 638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.69 : 934.38 = 425.94 : x
  2. Step 2: Convert to fraction form
    623.69/934.38 = 425.94/x
  3. Step 3: Cross multiply
    623.69x = 934.38 × 425.94
  4. Step 4: Simplify right side
    623.69x = 397,986.31
  5. Step 5: Solve for x
    x = 397,986.31/623.69
  6. Step 6: Final answer
    x = 638.12

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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.