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Finding the Fourth Proportional to 697.18, 962.12 and 386.68

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Solution

The fourth proportional to 697.18, 962.12 and 386.68 is: 533.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.18 : 962.12 = 386.68 : x
  2. Step 2: Convert to fraction form
    697.18/962.12 = 386.68/x
  3. Step 3: Cross multiply
    697.18x = 962.12 × 386.68
  4. Step 4: Simplify right side
    697.18x = 372,032.56
  5. Step 5: Solve for x
    x = 372,032.56/697.18
  6. Step 6: Final answer
    x = 533.62

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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.