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Finding the Fourth Proportional to 285.04, 392.18 and 222.76

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Solution

The fourth proportional to 285.04, 392.18 and 222.76 is: 306.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.04 : 392.18 = 222.76 : x
  2. Step 2: Convert to fraction form
    285.04/392.18 = 222.76/x
  3. Step 3: Cross multiply
    285.04x = 392.18 × 222.76
  4. Step 4: Simplify right side
    285.04x = 87,362.23
  5. Step 5: Solve for x
    x = 87,362.23/285.04
  6. Step 6: Final answer
    x = 306.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.