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Finding the Fourth Proportional to 312.93, 470.07 and 255.24

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Solution

The fourth proportional to 312.93, 470.07 and 255.24 is: 383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.93 : 470.07 = 255.24 : x
  2. Step 2: Convert to fraction form
    312.93/470.07 = 255.24/x
  3. Step 3: Cross multiply
    312.93x = 470.07 × 255.24
  4. Step 4: Simplify right side
    312.93x = 119,980.67
  5. Step 5: Solve for x
    x = 119,980.67/312.93
  6. Step 6: Final answer
    x = 383.41

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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.