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Finding the Fourth Proportional to 470.08, 647.70 and 338.86

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Solution

The fourth proportional to 470.08, 647.70 and 338.86 is: 466.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.08 : 647.70 = 338.86 : x
  2. Step 2: Convert to fraction form
    470.08/647.70 = 338.86/x
  3. Step 3: Cross multiply
    470.08x = 647.70 × 338.86
  4. Step 4: Simplify right side
    470.08x = 219,479.62
  5. Step 5: Solve for x
    x = 219,479.62/470.08
  6. Step 6: Final answer
    x = 466.90

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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.