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Finding the Fourth Proportional to 223.04, 307.77 and 128.49

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Solution

The fourth proportional to 223.04, 307.77 and 128.49 is: 177.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.04 : 307.77 = 128.49 : x
  2. Step 2: Convert to fraction form
    223.04/307.77 = 128.49/x
  3. Step 3: Cross multiply
    223.04x = 307.77 × 128.49
  4. Step 4: Simplify right side
    223.04x = 39,545.37
  5. Step 5: Solve for x
    x = 39,545.37/223.04
  6. Step 6: Final answer
    x = 177.31

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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.