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Finding the Fourth Proportional to 624.29, 934.40 and 438.26

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Solution

The fourth proportional to 624.29, 934.40 and 438.26 is: 655.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.29 : 934.40 = 438.26 : x
  2. Step 2: Convert to fraction form
    624.29/934.40 = 438.26/x
  3. Step 3: Cross multiply
    624.29x = 934.40 × 438.26
  4. Step 4: Simplify right side
    624.29x = 409,506.57
  5. Step 5: Solve for x
    x = 409,506.57/624.29
  6. Step 6: Final answer
    x = 655.96

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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.