Home / 1,412.55-1,947.57-1,080.45

Finding the Fourth Proportional to 1,412.55, 1,947.57 and 1,080.45

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Solution

The fourth proportional to 1,412.55, 1,947.57 and 1,080.45 is: 1,489.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.55 : 1,947.57 = 1,080.45 : x
  2. Step 2: Convert to fraction form
    1,412.55/1,947.57 = 1,080.45/x
  3. Step 3: Cross multiply
    1,412.55x = 1,947.57 × 1,080.45
  4. Step 4: Simplify right side
    1,412.55x = 2,104,252.01
  5. Step 5: Solve for x
    x = 2,104,252.01/1,412.55
  6. Step 6: Final answer
    x = 1,489.68

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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.