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Finding the Fourth Proportional to 941.06, 1,411.60 and 553.78

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Solution

The fourth proportional to 941.06, 1,411.60 and 553.78 is: 830.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.06 : 1,411.60 = 553.78 : x
  2. Step 2: Convert to fraction form
    941.06/1,411.60 = 553.78/x
  3. Step 3: Cross multiply
    941.06x = 1,411.60 × 553.78
  4. Step 4: Simplify right side
    941.06x = 781,715.85
  5. Step 5: Solve for x
    x = 781,715.85/941.06
  6. Step 6: Final answer
    x = 830.68

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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.