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Finding the Fourth Proportional to 2,777.60, 4,145.28 and 2,553.60

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Solution

The fourth proportional to 2,777.60, 4,145.28 and 2,553.60 is: 3,810.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.60 : 4,145.28 = 2,553.60 : x
  2. Step 2: Convert to fraction form
    2,777.60/4,145.28 = 2,553.60/x
  3. Step 3: Cross multiply
    2,777.60x = 4,145.28 × 2,553.60
  4. Step 4: Simplify right side
    2,777.60x = 10,585,387.01
  5. Step 5: Solve for x
    x = 10,585,387.01/2,777.60
  6. Step 6: Final answer
    x = 3,810.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.