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Finding the Fourth Proportional to 648.84, 971.84 and 454.80

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Solution

The fourth proportional to 648.84, 971.84 and 454.80 is: 681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.84 : 971.84 = 454.80 : x
  2. Step 2: Convert to fraction form
    648.84/971.84 = 454.80/x
  3. Step 3: Cross multiply
    648.84x = 971.84 × 454.80
  4. Step 4: Simplify right side
    648.84x = 441,992.83
  5. Step 5: Solve for x
    x = 441,992.83/648.84
  6. Step 6: Final answer
    x = 681.20

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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.