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Finding the Fourth Proportional to 866.64, 1,196.13 and 493.59

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Solution

The fourth proportional to 866.64, 1,196.13 and 493.59 is: 681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.64 : 1,196.13 = 493.59 : x
  2. Step 2: Convert to fraction form
    866.64/1,196.13 = 493.59/x
  3. Step 3: Cross multiply
    866.64x = 1,196.13 × 493.59
  4. Step 4: Simplify right side
    866.64x = 590,402.06
  5. Step 5: Solve for x
    x = 590,402.06/866.64
  6. Step 6: Final answer
    x = 681.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.