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Finding the Fourth Proportional to 660.81, 912.08 and 412.43

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Solution

The fourth proportional to 660.81, 912.08 and 412.43 is: 569.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.81 : 912.08 = 412.43 : x
  2. Step 2: Convert to fraction form
    660.81/912.08 = 412.43/x
  3. Step 3: Cross multiply
    660.81x = 912.08 × 412.43
  4. Step 4: Simplify right side
    660.81x = 376,163.31
  5. Step 5: Solve for x
    x = 376,163.31/660.81
  6. Step 6: Final answer
    x = 569.25

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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.