Home / 2,887.52-3,984.78-1,561.23

Finding the Fourth Proportional to 2,887.52, 3,984.78 and 1,561.23

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Solution

The fourth proportional to 2,887.52, 3,984.78 and 1,561.23 is: 2,154.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.52 : 3,984.78 = 1,561.23 : x
  2. Step 2: Convert to fraction form
    2,887.52/3,984.78 = 1,561.23/x
  3. Step 3: Cross multiply
    2,887.52x = 3,984.78 × 1,561.23
  4. Step 4: Simplify right side
    2,887.52x = 6,221,151.93
  5. Step 5: Solve for x
    x = 6,221,151.93/2,887.52
  6. Step 6: Final answer
    x = 2,154.49

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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.