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Finding the Fourth Proportional to 617.69, 926.54 and 515.05

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Solution

The fourth proportional to 617.69, 926.54 and 515.05 is: 772.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.69 : 926.54 = 515.05 : x
  2. Step 2: Convert to fraction form
    617.69/926.54 = 515.05/x
  3. Step 3: Cross multiply
    617.69x = 926.54 × 515.05
  4. Step 4: Simplify right side
    617.69x = 477,214.43
  5. Step 5: Solve for x
    x = 477,214.43/617.69
  6. Step 6: Final answer
    x = 772.58

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Similar ratio
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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.