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Finding the Fourth Proportional to 661.71, 991.79 and 296.07

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Solution

The fourth proportional to 661.71, 991.79 and 296.07 is: 443.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.71 : 991.79 = 296.07 : x
  2. Step 2: Convert to fraction form
    661.71/991.79 = 296.07/x
  3. Step 3: Cross multiply
    661.71x = 991.79 × 296.07
  4. Step 4: Simplify right side
    661.71x = 293,637.78
  5. Step 5: Solve for x
    x = 293,637.78/661.71
  6. Step 6: Final answer
    x = 443.76

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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.