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Finding the Fourth Proportional to 661.61, 913.00 and 366.86

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Solution

The fourth proportional to 661.61, 913.00 and 366.86 is: 506.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.61 : 913.00 = 366.86 : x
  2. Step 2: Convert to fraction form
    661.61/913.00 = 366.86/x
  3. Step 3: Cross multiply
    661.61x = 913.00 × 366.86
  4. Step 4: Simplify right side
    661.61x = 334,936.78
  5. Step 5: Solve for x
    x = 334,936.78/661.61
  6. Step 6: Final answer
    x = 506.25

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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.