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Finding the Fourth Proportional to 223.06, 307.81 and 156.76

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Solution

The fourth proportional to 223.06, 307.81 and 156.76 is: 216.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.06 : 307.81 = 156.76 : x
  2. Step 2: Convert to fraction form
    223.06/307.81 = 156.76/x
  3. Step 3: Cross multiply
    223.06x = 307.81 × 156.76
  4. Step 4: Simplify right side
    223.06x = 48,252.87
  5. Step 5: Solve for x
    x = 48,252.87/223.06
  6. Step 6: Final answer
    x = 216.33

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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.