Home / 1,561.68-2,151.36-1,449.36

Finding the Fourth Proportional to 1,561.68, 2,151.36 and 1,449.36

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Solution

The fourth proportional to 1,561.68, 2,151.36 and 1,449.36 is: 1,996.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.68 : 2,151.36 = 1,449.36 : x
  2. Step 2: Convert to fraction form
    1,561.68/2,151.36 = 1,449.36/x
  3. Step 3: Cross multiply
    1,561.68x = 2,151.36 × 1,449.36
  4. Step 4: Simplify right side
    1,561.68x = 3,118,095.13
  5. Step 5: Solve for x
    x = 3,118,095.13/1,561.68
  6. Step 6: Final answer
    x = 1,996.63

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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.