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Finding the Fourth Proportional to 648.16, 971.92 and 335.76

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Solution

The fourth proportional to 648.16, 971.92 and 335.76 is: 503.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.16 : 971.92 = 335.76 : x
  2. Step 2: Convert to fraction form
    648.16/971.92 = 335.76/x
  3. Step 3: Cross multiply
    648.16x = 971.92 × 335.76
  4. Step 4: Simplify right side
    648.16x = 326,331.86
  5. Step 5: Solve for x
    x = 326,331.86/648.16
  6. Step 6: Final answer
    x = 503.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.