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Finding the Fourth Proportional to 934.57, 1,402.11 and 285.29

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Solution

The fourth proportional to 934.57, 1,402.11 and 285.29 is: 428.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.57 : 1,402.11 = 285.29 : x
  2. Step 2: Convert to fraction form
    934.57/1,402.11 = 285.29/x
  3. Step 3: Cross multiply
    934.57x = 1,402.11 × 285.29
  4. Step 4: Simplify right side
    934.57x = 400,006.21
  5. Step 5: Solve for x
    x = 400,006.21/934.57
  6. Step 6: Final answer
    x = 428.01

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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.