Home / 1,378.30-1,903.99-1,253.74

Finding the Fourth Proportional to 1,378.30, 1,903.99 and 1,253.74

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Solution

The fourth proportional to 1,378.30, 1,903.99 and 1,253.74 is: 1,731.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.30 : 1,903.99 = 1,253.74 : x
  2. Step 2: Convert to fraction form
    1,378.30/1,903.99 = 1,253.74/x
  3. Step 3: Cross multiply
    1,378.30x = 1,903.99 × 1,253.74
  4. Step 4: Simplify right side
    1,378.30x = 2,387,112.37
  5. Step 5: Solve for x
    x = 2,387,112.37/1,378.30
  6. Step 6: Final answer
    x = 1,731.92

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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.