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Finding the Fourth Proportional to 223.80, 309.24 and 210.48

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Solution

The fourth proportional to 223.80, 309.24 and 210.48 is: 290.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.80 : 309.24 = 210.48 : x
  2. Step 2: Convert to fraction form
    223.80/309.24 = 210.48/x
  3. Step 3: Cross multiply
    223.80x = 309.24 × 210.48
  4. Step 4: Simplify right side
    223.80x = 65,088.84
  5. Step 5: Solve for x
    x = 65,088.84/223.80
  6. Step 6: Final answer
    x = 290.83

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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.