Home / 1,555.22-2,331.92-581.40

Finding the Fourth Proportional to 1,555.22, 2,331.92 and 581.40

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Solution

The fourth proportional to 1,555.22, 2,331.92 and 581.40 is: 871.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.22 : 2,331.92 = 581.40 : x
  2. Step 2: Convert to fraction form
    1,555.22/2,331.92 = 581.40/x
  3. Step 3: Cross multiply
    1,555.22x = 2,331.92 × 581.40
  4. Step 4: Simplify right side
    1,555.22x = 1,355,779.74
  5. Step 5: Solve for x
    x = 1,355,779.74/1,555.22
  6. Step 6: Final answer
    x = 871.76

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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.