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Finding the Fourth Proportional to 661.64, 991.85 and 337.23

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Solution

The fourth proportional to 661.64, 991.85 and 337.23 is: 505.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.64 : 991.85 = 337.23 : x
  2. Step 2: Convert to fraction form
    661.64/991.85 = 337.23/x
  3. Step 3: Cross multiply
    661.64x = 991.85 × 337.23
  4. Step 4: Simplify right side
    661.64x = 334,479.89
  5. Step 5: Solve for x
    x = 334,479.89/661.64
  6. Step 6: Final answer
    x = 505.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.