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Finding the Fourth Proportional to 648.79, 968.20 and 579.59

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Solution

The fourth proportional to 648.79, 968.20 and 579.59 is: 864.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.79 : 968.20 = 579.59 : x
  2. Step 2: Convert to fraction form
    648.79/968.20 = 579.59/x
  3. Step 3: Cross multiply
    648.79x = 968.20 × 579.59
  4. Step 4: Simplify right side
    648.79x = 561,159.04
  5. Step 5: Solve for x
    x = 561,159.04/648.79
  6. Step 6: Final answer
    x = 864.93

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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.