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Finding the Fourth Proportional to 697.66, 1,046.52 and 210.71

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Solution

The fourth proportional to 697.66, 1,046.52 and 210.71 is: 316.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.66 : 1,046.52 = 210.71 : x
  2. Step 2: Convert to fraction form
    697.66/1,046.52 = 210.71/x
  3. Step 3: Cross multiply
    697.66x = 1,046.52 × 210.71
  4. Step 4: Simplify right side
    697.66x = 220,514.85
  5. Step 5: Solve for x
    x = 220,514.85/697.66
  6. Step 6: Final answer
    x = 316.08

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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.