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Finding the Fourth Proportional to 694.89, 959.55 and 521.13

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Solution

The fourth proportional to 694.89, 959.55 and 521.13 is: 719.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.89 : 959.55 = 521.13 : x
  2. Step 2: Convert to fraction form
    694.89/959.55 = 521.13/x
  3. Step 3: Cross multiply
    694.89x = 959.55 × 521.13
  4. Step 4: Simplify right side
    694.89x = 500,050.29
  5. Step 5: Solve for x
    x = 500,050.29/694.89
  6. Step 6: Final answer
    x = 719.61

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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.