Home / 1,561.07-2,154.21-862.44

Finding the Fourth Proportional to 1,561.07, 2,154.21 and 862.44

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Solution

The fourth proportional to 1,561.07, 2,154.21 and 862.44 is: 1,190.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.07 : 2,154.21 = 862.44 : x
  2. Step 2: Convert to fraction form
    1,561.07/2,154.21 = 862.44/x
  3. Step 3: Cross multiply
    1,561.07x = 2,154.21 × 862.44
  4. Step 4: Simplify right side
    1,561.07x = 1,857,876.87
  5. Step 5: Solve for x
    x = 1,857,876.87/1,561.07
  6. Step 6: Final answer
    x = 1,190.13

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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.