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Finding the Fourth Proportional to 707.55, 1,061.36 and 220.61

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Solution

The fourth proportional to 707.55, 1,061.36 and 220.61 is: 330.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.55 : 1,061.36 = 220.61 : x
  2. Step 2: Convert to fraction form
    707.55/1,061.36 = 220.61/x
  3. Step 3: Cross multiply
    707.55x = 1,061.36 × 220.61
  4. Step 4: Simplify right side
    707.55x = 234,140.22
  5. Step 5: Solve for x
    x = 234,140.22/707.55
  6. Step 6: Final answer
    x = 330.92

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