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Finding the Fourth Proportional to 660.48, 988.57 and 487.08

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Solution

The fourth proportional to 660.48, 988.57 and 487.08 is: 729.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.48 : 988.57 = 487.08 : x
  2. Step 2: Convert to fraction form
    660.48/988.57 = 487.08/x
  3. Step 3: Cross multiply
    660.48x = 988.57 × 487.08
  4. Step 4: Simplify right side
    660.48x = 481,512.68
  5. Step 5: Solve for x
    x = 481,512.68/660.48
  6. Step 6: Final answer
    x = 729.03

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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.