Home / 1,331.49-1,820.36-1,280.46

Finding the Fourth Proportional to 1,331.49, 1,820.36 and 1,280.46

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Solution

The fourth proportional to 1,331.49, 1,820.36 and 1,280.46 is: 1,750.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.49 : 1,820.36 = 1,280.46 : x
  2. Step 2: Convert to fraction form
    1,331.49/1,820.36 = 1,280.46/x
  3. Step 3: Cross multiply
    1,331.49x = 1,820.36 × 1,280.46
  4. Step 4: Simplify right side
    1,331.49x = 2,330,891.76
  5. Step 5: Solve for x
    x = 2,330,891.76/1,331.49
  6. Step 6: Final answer
    x = 1,750.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.