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Finding the Fourth Proportional to 696.01, 961.13 and 521.05

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Solution

The fourth proportional to 696.01, 961.13 and 521.05 is: 719.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.01 : 961.13 = 521.05 : x
  2. Step 2: Convert to fraction form
    696.01/961.13 = 521.05/x
  3. Step 3: Cross multiply
    696.01x = 961.13 × 521.05
  4. Step 4: Simplify right side
    696.01x = 500,793.28
  5. Step 5: Solve for x
    x = 500,793.28/696.01
  6. Step 6: Final answer
    x = 719.53

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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.