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Finding the Fourth Proportional to 707.29, 1,060.90 and 220.21

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Solution

The fourth proportional to 707.29, 1,060.90 and 220.21 is: 330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.29 : 1,060.90 = 220.21 : x
  2. Step 2: Convert to fraction form
    707.29/1,060.90 = 220.21/x
  3. Step 3: Cross multiply
    707.29x = 1,060.90 × 220.21
  4. Step 4: Simplify right side
    707.29x = 233,620.79
  5. Step 5: Solve for x
    x = 233,620.79/707.29
  6. Step 6: Final answer
    x = 330.30

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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.