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Finding the Fourth Proportional to 470.45, 649.36 and 283.91

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Solution

The fourth proportional to 470.45, 649.36 and 283.91 is: 391.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.45 : 649.36 = 283.91 : x
  2. Step 2: Convert to fraction form
    470.45/649.36 = 283.91/x
  3. Step 3: Cross multiply
    470.45x = 649.36 × 283.91
  4. Step 4: Simplify right side
    470.45x = 184,359.66
  5. Step 5: Solve for x
    x = 184,359.66/470.45
  6. Step 6: Final answer
    x = 391.88

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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.