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Finding the Fourth Proportional to 615.04, 918.68 and 517.84

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Solution

The fourth proportional to 615.04, 918.68 and 517.84 is: 773.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.04 : 918.68 = 517.84 : x
  2. Step 2: Convert to fraction form
    615.04/918.68 = 517.84/x
  3. Step 3: Cross multiply
    615.04x = 918.68 × 517.84
  4. Step 4: Simplify right side
    615.04x = 475,729.25
  5. Step 5: Solve for x
    x = 475,729.25/615.04
  6. Step 6: Final answer
    x = 773.49

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.