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Finding the Fourth Proportional to 470.43, 648.63 and 403.92

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Solution

The fourth proportional to 470.43, 648.63 and 403.92 is: 556.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.43 : 648.63 = 403.92 : x
  2. Step 2: Convert to fraction form
    470.43/648.63 = 403.92/x
  3. Step 3: Cross multiply
    470.43x = 648.63 × 403.92
  4. Step 4: Simplify right side
    470.43x = 261,994.63
  5. Step 5: Solve for x
    x = 261,994.63/470.43
  6. Step 6: Final answer
    x = 556.93

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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.