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Finding the Fourth Proportional to 707.58, 1,061.19 and 220.38

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Solution

The fourth proportional to 707.58, 1,061.19 and 220.38 is: 330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.58 : 1,061.19 = 220.38 : x
  2. Step 2: Convert to fraction form
    707.58/1,061.19 = 220.38/x
  3. Step 3: Cross multiply
    707.58x = 1,061.19 × 220.38
  4. Step 4: Simplify right side
    707.58x = 233,865.05
  5. Step 5: Solve for x
    x = 233,865.05/707.58
  6. Step 6: Final answer
    x = 330.51

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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.