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Finding the Fourth Proportional to 315.94, 436.06 and 212.38

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Solution

The fourth proportional to 315.94, 436.06 and 212.38 is: 293.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.94 : 436.06 = 212.38 : x
  2. Step 2: Convert to fraction form
    315.94/436.06 = 212.38/x
  3. Step 3: Cross multiply
    315.94x = 436.06 × 212.38
  4. Step 4: Simplify right side
    315.94x = 92,607.71
  5. Step 5: Solve for x
    x = 92,607.71/315.94
  6. Step 6: Final answer
    x = 293.12

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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.