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Finding the Fourth Proportional to 470.90, 649.73 and 313.35

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Solution

The fourth proportional to 470.90, 649.73 and 313.35 is: 432.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.90 : 649.73 = 313.35 : x
  2. Step 2: Convert to fraction form
    470.90/649.73 = 313.35/x
  3. Step 3: Cross multiply
    470.90x = 649.73 × 313.35
  4. Step 4: Simplify right side
    470.90x = 203,591.33
  5. Step 5: Solve for x
    x = 203,591.33/470.90
  6. Step 6: Final answer
    x = 432.35

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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.