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Finding the Fourth Proportional to 661.65, 912.99 and 366.93

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Solution

The fourth proportional to 661.65, 912.99 and 366.93 is: 506.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.65 : 912.99 = 366.93 : x
  2. Step 2: Convert to fraction form
    661.65/912.99 = 366.93/x
  3. Step 3: Cross multiply
    661.65x = 912.99 × 366.93
  4. Step 4: Simplify right side
    661.65x = 335,003.42
  5. Step 5: Solve for x
    x = 335,003.42/661.65
  6. Step 6: Final answer
    x = 506.32

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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.