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Finding the Fourth Proportional to 613.30, 845.88 and 520.30

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Solution

The fourth proportional to 613.30, 845.88 and 520.30 is: 717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.30 : 845.88 = 520.30 : x
  2. Step 2: Convert to fraction form
    613.30/845.88 = 520.30/x
  3. Step 3: Cross multiply
    613.30x = 845.88 × 520.30
  4. Step 4: Simplify right side
    613.30x = 440,111.36
  5. Step 5: Solve for x
    x = 440,111.36/613.30
  6. Step 6: Final answer
    x = 717.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.