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Finding the Fourth Proportional to 661.60, 991.84 and 250.51

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Solution

The fourth proportional to 661.60, 991.84 and 250.51 is: 375.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.60 : 991.84 = 250.51 : x
  2. Step 2: Convert to fraction form
    661.60/991.84 = 250.51/x
  3. Step 3: Cross multiply
    661.60x = 991.84 × 250.51
  4. Step 4: Simplify right side
    661.60x = 248,465.84
  5. Step 5: Solve for x
    x = 248,465.84/661.60
  6. Step 6: Final answer
    x = 375.55

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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.