Home / 1,387.93-2,080.08-1,240.81

Finding the Fourth Proportional to 1,387.93, 2,080.08 and 1,240.81

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Solution

The fourth proportional to 1,387.93, 2,080.08 and 1,240.81 is: 1,859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.93 : 2,080.08 = 1,240.81 : x
  2. Step 2: Convert to fraction form
    1,387.93/2,080.08 = 1,240.81/x
  3. Step 3: Cross multiply
    1,387.93x = 2,080.08 × 1,240.81
  4. Step 4: Simplify right side
    1,387.93x = 2,580,984.06
  5. Step 5: Solve for x
    x = 2,580,984.06/1,387.93
  6. Step 6: Final answer
    x = 1,859.59

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1.5x scale

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.