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Finding the Fourth Proportional to 648.94, 968.39 and 579.72

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Solution

The fourth proportional to 648.94, 968.39 and 579.72 is: 865.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.94 : 968.39 = 579.72 : x
  2. Step 2: Convert to fraction form
    648.94/968.39 = 579.72/x
  3. Step 3: Cross multiply
    648.94x = 968.39 × 579.72
  4. Step 4: Simplify right side
    648.94x = 561,395.05
  5. Step 5: Solve for x
    x = 561,395.05/648.94
  6. Step 6: Final answer
    x = 865.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.