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Finding the Fourth Proportional to 871.46, 1,307.18 and 222.19

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Solution

The fourth proportional to 871.46, 1,307.18 and 222.19 is: 333.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.46 : 1,307.18 = 222.19 : x
  2. Step 2: Convert to fraction form
    871.46/1,307.18 = 222.19/x
  3. Step 3: Cross multiply
    871.46x = 1,307.18 × 222.19
  4. Step 4: Simplify right side
    871.46x = 290,435.23
  5. Step 5: Solve for x
    x = 290,435.23/871.46
  6. Step 6: Final answer
    x = 333.28

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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.