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Finding the Fourth Proportional to 315.12, 473 and 223.92

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Solution

The fourth proportional to 315.12, 473 and 223.92 is: 336.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.12 : 473 = 223.92 : x
  2. Step 2: Convert to fraction form
    315.12/473 = 223.92/x
  3. Step 3: Cross multiply
    315.12x = 473 × 223.92
  4. Step 4: Simplify right side
    315.12x = 105,914.16
  5. Step 5: Solve for x
    x = 105,914.16/315.12
  6. Step 6: Final answer
    x = 336.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.