Home / 2,421.16-3,630.96-777.31

Finding the Fourth Proportional to 2,421.16, 3,630.96 and 777.31

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Solution

The fourth proportional to 2,421.16, 3,630.96 and 777.31 is: 1,165.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.16 : 3,630.96 = 777.31 : x
  2. Step 2: Convert to fraction form
    2,421.16/3,630.96 = 777.31/x
  3. Step 3: Cross multiply
    2,421.16x = 3,630.96 × 777.31
  4. Step 4: Simplify right side
    2,421.16x = 2,822,372.44
  5. Step 5: Solve for x
    x = 2,822,372.44/2,421.16
  6. Step 6: Final answer
    x = 1,165.71

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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.