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Finding the Fourth Proportional to 223.18, 307.76 and 176.40

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Solution

The fourth proportional to 223.18, 307.76 and 176.40 is: 243.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.18 : 307.76 = 176.40 : x
  2. Step 2: Convert to fraction form
    223.18/307.76 = 176.40/x
  3. Step 3: Cross multiply
    223.18x = 307.76 × 176.40
  4. Step 4: Simplify right side
    223.18x = 54,287.98
  5. Step 5: Solve for x
    x = 54,287.98/223.18
  6. Step 6: Final answer
    x = 243.25

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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.