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Finding the Fourth Proportional to 697.62, 1,046.54 and 210.62

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Solution

The fourth proportional to 697.62, 1,046.54 and 210.62 is: 315.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.62 : 1,046.54 = 210.62 : x
  2. Step 2: Convert to fraction form
    697.62/1,046.54 = 210.62/x
  3. Step 3: Cross multiply
    697.62x = 1,046.54 × 210.62
  4. Step 4: Simplify right side
    697.62x = 220,415.97
  5. Step 5: Solve for x
    x = 220,415.97/697.62
  6. Step 6: Final answer
    x = 315.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.