Home / 2,421.30-3,631.59-777.99

Finding the Fourth Proportional to 2,421.30, 3,631.59 and 777.99

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Solution

The fourth proportional to 2,421.30, 3,631.59 and 777.99 is: 1,166.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.30 : 3,631.59 = 777.99 : x
  2. Step 2: Convert to fraction form
    2,421.30/3,631.59 = 777.99/x
  3. Step 3: Cross multiply
    2,421.30x = 3,631.59 × 777.99
  4. Step 4: Simplify right side
    2,421.30x = 2,825,340.70
  5. Step 5: Solve for x
    x = 2,825,340.70/2,421.30
  6. Step 6: Final answer
    x = 1,166.87

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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.