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Finding the Fourth Proportional to 315.88, 436.19 and 222.83

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Solution

The fourth proportional to 315.88, 436.19 and 222.83 is: 307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.88 : 436.19 = 222.83 : x
  2. Step 2: Convert to fraction form
    315.88/436.19 = 222.83/x
  3. Step 3: Cross multiply
    315.88x = 436.19 × 222.83
  4. Step 4: Simplify right side
    315.88x = 97,197.01
  5. Step 5: Solve for x
    x = 97,197.01/315.88
  6. Step 6: Final answer
    x = 307.70

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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.