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Finding the Fourth Proportional to 661.65, 913.06 and 366.93

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Solution

The fourth proportional to 661.65, 913.06 and 366.93 is: 506.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.65 : 913.06 = 366.93 : x
  2. Step 2: Convert to fraction form
    661.65/913.06 = 366.93/x
  3. Step 3: Cross multiply
    661.65x = 913.06 × 366.93
  4. Step 4: Simplify right side
    661.65x = 335,029.56
  5. Step 5: Solve for x
    x = 335,029.56/661.65
  6. Step 6: Final answer
    x = 506.36

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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.