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Finding the Fourth Proportional to 288.84, 397.62 and 223.22

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Solution

The fourth proportional to 288.84, 397.62 and 223.22 is: 307.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.84 : 397.62 = 223.22 : x
  2. Step 2: Convert to fraction form
    288.84/397.62 = 223.22/x
  3. Step 3: Cross multiply
    288.84x = 397.62 × 223.22
  4. Step 4: Simplify right side
    288.84x = 88,756.74
  5. Step 5: Solve for x
    x = 88,756.74/288.84
  6. Step 6: Final answer
    x = 307.29

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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.