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Finding the Fourth Proportional to 941.85, 1,299.79 and 626.61

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Solution

The fourth proportional to 941.85, 1,299.79 and 626.61 is: 864.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.85 : 1,299.79 = 626.61 : x
  2. Step 2: Convert to fraction form
    941.85/1,299.79 = 626.61/x
  3. Step 3: Cross multiply
    941.85x = 1,299.79 × 626.61
  4. Step 4: Simplify right side
    941.85x = 814,459.73
  5. Step 5: Solve for x
    x = 814,459.73/941.85
  6. Step 6: Final answer
    x = 864.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.