Home / 1,555.34-2,331.18-861.84

Finding the Fourth Proportional to 1,555.34, 2,331.18 and 861.84

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Solution

The fourth proportional to 1,555.34, 2,331.18 and 861.84 is: 1,291.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.34 : 2,331.18 = 861.84 : x
  2. Step 2: Convert to fraction form
    1,555.34/2,331.18 = 861.84/x
  3. Step 3: Cross multiply
    1,555.34x = 2,331.18 × 861.84
  4. Step 4: Simplify right side
    1,555.34x = 2,009,104.17
  5. Step 5: Solve for x
    x = 2,009,104.17/1,555.34
  6. Step 6: Final answer
    x = 1,291.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.