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Finding the Fourth Proportional to 5,177.87, 7,145.87 and 2,940.45

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Solution

The fourth proportional to 5,177.87, 7,145.87 and 2,940.45 is: 4,058.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,177.87 : 7,145.87 = 2,940.45 : x
  2. Step 2: Convert to fraction form
    5,177.87/7,145.87 = 2,940.45/x
  3. Step 3: Cross multiply
    5,177.87x = 7,145.87 × 2,940.45
  4. Step 4: Simplify right side
    5,177.87x = 21,012,088.68
  5. Step 5: Solve for x
    x = 21,012,088.68/5,177.87
  6. Step 6: Final answer
    x = 4,058.05

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1.5x scale

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.