Home / 1,260.43-1,887.55-1,039.70

Finding the Fourth Proportional to 1,260.43, 1,887.55 and 1,039.70

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Solution

The fourth proportional to 1,260.43, 1,887.55 and 1,039.70 is: 1,557.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.43 : 1,887.55 = 1,039.70 : x
  2. Step 2: Convert to fraction form
    1,260.43/1,887.55 = 1,039.70/x
  3. Step 3: Cross multiply
    1,260.43x = 1,887.55 × 1,039.70
  4. Step 4: Simplify right side
    1,260.43x = 1,962,493.70
  5. Step 5: Solve for x
    x = 1,962,493.70/1,260.43
  6. Step 6: Final answer
    x = 1,557.01

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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.