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Finding the Fourth Proportional to 2,509.08, 3,762.90 and 865.20

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Solution

The fourth proportional to 2,509.08, 3,762.90 and 865.20 is: 1,297.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,509.08 : 3,762.90 = 865.20 : x
  2. Step 2: Convert to fraction form
    2,509.08/3,762.90 = 865.20/x
  3. Step 3: Cross multiply
    2,509.08x = 3,762.90 × 865.20
  4. Step 4: Simplify right side
    2,509.08x = 3,255,661.08
  5. Step 5: Solve for x
    x = 3,255,661.08/2,509.08
  6. Step 6: Final answer
    x = 1,297.55

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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.