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Finding the Fourth Proportional to 5,291.78, 7,937.75 and 2,518.75

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Solution

The fourth proportional to 5,291.78, 7,937.75 and 2,518.75 is: 3,778.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,291.78 : 7,937.75 = 2,518.75 : x
  2. Step 2: Convert to fraction form
    5,291.78/7,937.75 = 2,518.75/x
  3. Step 3: Cross multiply
    5,291.78x = 7,937.75 × 2,518.75
  4. Step 4: Simplify right side
    5,291.78x = 19,993,165.21
  5. Step 5: Solve for x
    x = 19,993,165.21/5,291.78
  6. Step 6: Final answer
    x = 3,778.15

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1.5x scale

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.