Home / 1,478.15-2,037.64-1,240.31

Finding the Fourth Proportional to 1,478.15, 2,037.64 and 1,240.31

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Solution

The fourth proportional to 1,478.15, 2,037.64 and 1,240.31 is: 1,709.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.15 : 2,037.64 = 1,240.31 : x
  2. Step 2: Convert to fraction form
    1,478.15/2,037.64 = 1,240.31/x
  3. Step 3: Cross multiply
    1,478.15x = 2,037.64 × 1,240.31
  4. Step 4: Simplify right side
    1,478.15x = 2,527,309.59
  5. Step 5: Solve for x
    x = 2,527,309.59/1,478.15
  6. Step 6: Final answer
    x = 1,709.78

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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.