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Finding the Fourth Proportional to 613.06, 917.16 and 491.56

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Solution

The fourth proportional to 613.06, 917.16 and 491.56 is: 735.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.06 : 917.16 = 491.56 : x
  2. Step 2: Convert to fraction form
    613.06/917.16 = 491.56/x
  3. Step 3: Cross multiply
    613.06x = 917.16 × 491.56
  4. Step 4: Simplify right side
    613.06x = 450,839.17
  5. Step 5: Solve for x
    x = 450,839.17/613.06
  6. Step 6: Final answer
    x = 735.39

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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.