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Finding the Fourth Proportional to 613.02, 917.59 and 393.36

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Solution

The fourth proportional to 613.02, 917.59 and 393.36 is: 588.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.02 : 917.59 = 393.36 : x
  2. Step 2: Convert to fraction form
    613.02/917.59 = 393.36/x
  3. Step 3: Cross multiply
    613.02x = 917.59 × 393.36
  4. Step 4: Simplify right side
    613.02x = 360,943.20
  5. Step 5: Solve for x
    x = 360,943.20/613.02
  6. Step 6: Final answer
    x = 588.80

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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.