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Finding the Fourth Proportional to 648.44, 973.05 and 258.63

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Solution

The fourth proportional to 648.44, 973.05 and 258.63 is: 388.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.44 : 973.05 = 258.63 : x
  2. Step 2: Convert to fraction form
    648.44/973.05 = 258.63/x
  3. Step 3: Cross multiply
    648.44x = 973.05 × 258.63
  4. Step 4: Simplify right side
    648.44x = 251,659.92
  5. Step 5: Solve for x
    x = 251,659.92/648.44
  6. Step 6: Final answer
    x = 388.10

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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.