Home / 1,439.55-1,985.49-1,240.73

Finding the Fourth Proportional to 1,439.55, 1,985.49 and 1,240.73

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Solution

The fourth proportional to 1,439.55, 1,985.49 and 1,240.73 is: 1,711.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.55 : 1,985.49 = 1,240.73 : x
  2. Step 2: Convert to fraction form
    1,439.55/1,985.49 = 1,240.73/x
  3. Step 3: Cross multiply
    1,439.55x = 1,985.49 × 1,240.73
  4. Step 4: Simplify right side
    1,439.55x = 2,463,447.08
  5. Step 5: Solve for x
    x = 2,463,447.08/1,439.55
  6. Step 6: Final answer
    x = 1,711.26

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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.