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Finding the Fourth Proportional to 2,345.16, 3,517.74 and 613.78

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Solution

The fourth proportional to 2,345.16, 3,517.74 and 613.78 is: 920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.16 : 3,517.74 = 613.78 : x
  2. Step 2: Convert to fraction form
    2,345.16/3,517.74 = 613.78/x
  3. Step 3: Cross multiply
    2,345.16x = 3,517.74 × 613.78
  4. Step 4: Simplify right side
    2,345.16x = 2,159,118.46
  5. Step 5: Solve for x
    x = 2,159,118.46/2,345.16
  6. Step 6: Final answer
    x = 920.67

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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.