Home / 2,421.90-3,633.12-961.20

Finding the Fourth Proportional to 2,421.90, 3,633.12 and 961.20

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Solution

The fourth proportional to 2,421.90, 3,633.12 and 961.20 is: 1,441.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.90 : 3,633.12 = 961.20 : x
  2. Step 2: Convert to fraction form
    2,421.90/3,633.12 = 961.20/x
  3. Step 3: Cross multiply
    2,421.90x = 3,633.12 × 961.20
  4. Step 4: Simplify right side
    2,421.90x = 3,492,154.94
  5. Step 5: Solve for x
    x = 3,492,154.94/2,421.90
  6. Step 6: Final answer
    x = 1,441.91

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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.