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Finding the Fourth Proportional to 707.38, 1,060.88 and 213.84

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Solution

The fourth proportional to 707.38, 1,060.88 and 213.84 is: 320.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.38 : 1,060.88 = 213.84 : x
  2. Step 2: Convert to fraction form
    707.38/1,060.88 = 213.84/x
  3. Step 3: Cross multiply
    707.38x = 1,060.88 × 213.84
  4. Step 4: Simplify right side
    707.38x = 226,858.58
  5. Step 5: Solve for x
    x = 226,858.58/707.38
  6. Step 6: Final answer
    x = 320.70

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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.