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Finding the Fourth Proportional to 471.31, 706.76 and 146.70

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Solution

The fourth proportional to 471.31, 706.76 and 146.70 is: 219.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.31 : 706.76 = 146.70 : x
  2. Step 2: Convert to fraction form
    471.31/706.76 = 146.70/x
  3. Step 3: Cross multiply
    471.31x = 706.76 × 146.70
  4. Step 4: Simplify right side
    471.31x = 103,681.33
  5. Step 5: Solve for x
    x = 103,681.33/471.31
  6. Step 6: Final answer
    x = 219.99

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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.