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Finding the Fourth Proportional to 312.84, 470.07 and 254.47

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Solution

The fourth proportional to 312.84, 470.07 and 254.47 is: 382.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.84 : 470.07 = 254.47 : x
  2. Step 2: Convert to fraction form
    312.84/470.07 = 254.47/x
  3. Step 3: Cross multiply
    312.84x = 470.07 × 254.47
  4. Step 4: Simplify right side
    312.84x = 119,618.71
  5. Step 5: Solve for x
    x = 119,618.71/312.84
  6. Step 6: Final answer
    x = 382.36

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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.