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Finding the Fourth Proportional to 2,345.09, 3,517.65 and 613.71

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Solution

The fourth proportional to 2,345.09, 3,517.65 and 613.71 is: 920.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.09 : 3,517.65 = 613.71 : x
  2. Step 2: Convert to fraction form
    2,345.09/3,517.65 = 613.71/x
  3. Step 3: Cross multiply
    2,345.09x = 3,517.65 × 613.71
  4. Step 4: Simplify right side
    2,345.09x = 2,158,816.98
  5. Step 5: Solve for x
    x = 2,158,816.98/2,345.09
  6. Step 6: Final answer
    x = 920.57

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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.