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Finding the Fourth Proportional to 660.63, 911.03 and 475.03

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Solution

The fourth proportional to 660.63, 911.03 and 475.03 is: 655.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.63 : 911.03 = 475.03 : x
  2. Step 2: Convert to fraction form
    660.63/911.03 = 475.03/x
  3. Step 3: Cross multiply
    660.63x = 911.03 × 475.03
  4. Step 4: Simplify right side
    660.63x = 432,766.58
  5. Step 5: Solve for x
    x = 432,766.58/660.63
  6. Step 6: Final answer
    x = 655.08

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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.