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Finding the Fourth Proportional to 662.48, 912.98 and 475.66

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Solution

The fourth proportional to 662.48, 912.98 and 475.66 is: 655.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.48 : 912.98 = 475.66 : x
  2. Step 2: Convert to fraction form
    662.48/912.98 = 475.66/x
  3. Step 3: Cross multiply
    662.48x = 912.98 × 475.66
  4. Step 4: Simplify right side
    662.48x = 434,268.07
  5. Step 5: Solve for x
    x = 434,268.07/662.48
  6. Step 6: Final answer
    x = 655.52

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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.