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Finding the Fourth Proportional to 315.04, 472.56 and 206.56

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Solution

The fourth proportional to 315.04, 472.56 and 206.56 is: 309.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.04 : 472.56 = 206.56 : x
  2. Step 2: Convert to fraction form
    315.04/472.56 = 206.56/x
  3. Step 3: Cross multiply
    315.04x = 472.56 × 206.56
  4. Step 4: Simplify right side
    315.04x = 97,611.99
  5. Step 5: Solve for x
    x = 97,611.99/315.04
  6. Step 6: Final answer
    x = 309.84

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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.