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Finding the Fourth Proportional to 934.69, 1,401.11 and 318.25

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Solution

The fourth proportional to 934.69, 1,401.11 and 318.25 is: 477.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.69 : 1,401.11 = 318.25 : x
  2. Step 2: Convert to fraction form
    934.69/1,401.11 = 318.25/x
  3. Step 3: Cross multiply
    934.69x = 1,401.11 × 318.25
  4. Step 4: Simplify right side
    934.69x = 445,901.67
  5. Step 5: Solve for x
    x = 445,901.67/934.69
  6. Step 6: Final answer
    x = 477.06

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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.