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Finding the Fourth Proportional to 470.81, 649.67 and 260.95

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Solution

The fourth proportional to 470.81, 649.67 and 260.95 is: 360.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.81 : 649.67 = 260.95 : x
  2. Step 2: Convert to fraction form
    470.81/649.67 = 260.95/x
  3. Step 3: Cross multiply
    470.81x = 649.67 × 260.95
  4. Step 4: Simplify right side
    470.81x = 169,530.08
  5. Step 5: Solve for x
    x = 169,530.08/470.81
  6. Step 6: Final answer
    x = 360.09

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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.