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Finding the Fourth Proportional to 699, 964.66 and 388.52

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Solution

The fourth proportional to 699, 964.66 and 388.52 is: 536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    699 : 964.66 = 388.52 : x
  2. Step 2: Convert to fraction form
    699/964.66 = 388.52/x
  3. Step 3: Cross multiply
    699x = 964.66 × 388.52
  4. Step 4: Simplify right side
    699x = 374,789.70
  5. Step 5: Solve for x
    x = 374,789.70/699
  6. Step 6: Final answer
    x = 536.18

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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.