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Finding the Fourth Proportional to 617.81, 926.71 and 361.13

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Solution

The fourth proportional to 617.81, 926.71 and 361.13 is: 541.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.81 : 926.71 = 361.13 : x
  2. Step 2: Convert to fraction form
    617.81/926.71 = 361.13/x
  3. Step 3: Cross multiply
    617.81x = 926.71 × 361.13
  4. Step 4: Simplify right side
    617.81x = 334,657.25
  5. Step 5: Solve for x
    x = 334,657.25/617.81
  6. Step 6: Final answer
    x = 541.69

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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.