Home / 1,561.19-2,154.54-862.56

Finding the Fourth Proportional to 1,561.19, 2,154.54 and 862.56

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Solution

The fourth proportional to 1,561.19, 2,154.54 and 862.56 is: 1,190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.19 : 2,154.54 = 862.56 : x
  2. Step 2: Convert to fraction form
    1,561.19/2,154.54 = 862.56/x
  3. Step 3: Cross multiply
    1,561.19x = 2,154.54 × 862.56
  4. Step 4: Simplify right side
    1,561.19x = 1,858,420.02
  5. Step 5: Solve for x
    x = 1,858,420.02/1,561.19
  6. Step 6: Final answer
    x = 1,190.39

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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.