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Finding the Fourth Proportional to 941.29, 1,411.41 and 478.78

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Solution

The fourth proportional to 941.29, 1,411.41 and 478.78 is: 717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.29 : 1,411.41 = 478.78 : x
  2. Step 2: Convert to fraction form
    941.29/1,411.41 = 478.78/x
  3. Step 3: Cross multiply
    941.29x = 1,411.41 × 478.78
  4. Step 4: Simplify right side
    941.29x = 675,754.88
  5. Step 5: Solve for x
    x = 675,754.88/941.29
  6. Step 6: Final answer
    x = 717.90

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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.