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Finding the Fourth Proportional to 613.09, 917.47 and 475.26

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Solution

The fourth proportional to 613.09, 917.47 and 475.26 is: 711.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.09 : 917.47 = 475.26 : x
  2. Step 2: Convert to fraction form
    613.09/917.47 = 475.26/x
  3. Step 3: Cross multiply
    613.09x = 917.47 × 475.26
  4. Step 4: Simplify right side
    613.09x = 436,036.79
  5. Step 5: Solve for x
    x = 436,036.79/613.09
  6. Step 6: Final answer
    x = 711.21

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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.