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Finding the Fourth Proportional to 648.06, 971.88 and 258.17

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Solution

The fourth proportional to 648.06, 971.88 and 258.17 is: 387.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.06 : 971.88 = 258.17 : x
  2. Step 2: Convert to fraction form
    648.06/971.88 = 258.17/x
  3. Step 3: Cross multiply
    648.06x = 971.88 × 258.17
  4. Step 4: Simplify right side
    648.06x = 250,905.40
  5. Step 5: Solve for x
    x = 250,905.40/648.06
  6. Step 6: Final answer
    x = 387.16

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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.