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Finding the Fourth Proportional to 660.70, 991.54 and 250.20

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Solution

The fourth proportional to 660.70, 991.54 and 250.20 is: 375.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.70 : 991.54 = 250.20 : x
  2. Step 2: Convert to fraction form
    660.70/991.54 = 250.20/x
  3. Step 3: Cross multiply
    660.70x = 991.54 × 250.20
  4. Step 4: Simplify right side
    660.70x = 248,083.31
  5. Step 5: Solve for x
    x = 248,083.31/660.70
  6. Step 6: Final answer
    x = 375.49

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1.5x scale

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.