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Finding the Fourth Proportional to 2,739.45, 3,780.45 and 1,560.53

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Solution

The fourth proportional to 2,739.45, 3,780.45 and 1,560.53 is: 2,153.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.45 : 3,780.45 = 1,560.53 : x
  2. Step 2: Convert to fraction form
    2,739.45/3,780.45 = 1,560.53/x
  3. Step 3: Cross multiply
    2,739.45x = 3,780.45 × 1,560.53
  4. Step 4: Simplify right side
    2,739.45x = 5,899,486.74
  5. Step 5: Solve for x
    x = 5,899,486.74/2,739.45
  6. Step 6: Final answer
    x = 2,153.53

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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.