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Finding the Fourth Proportional to 941.78, 1,411.49 and 479.68

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Solution

The fourth proportional to 941.78, 1,411.49 and 479.68 is: 718.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.78 : 1,411.49 = 479.68 : x
  2. Step 2: Convert to fraction form
    941.78/1,411.49 = 479.68/x
  3. Step 3: Cross multiply
    941.78x = 1,411.49 × 479.68
  4. Step 4: Simplify right side
    941.78x = 677,063.52
  5. Step 5: Solve for x
    x = 677,063.52/941.78
  6. Step 6: Final answer
    x = 718.92

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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.