Home / 2,421.28-3,632.53-689.91

Finding the Fourth Proportional to 2,421.28, 3,632.53 and 689.91

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Solution

The fourth proportional to 2,421.28, 3,632.53 and 689.91 is: 1,035.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.28 : 3,632.53 = 689.91 : x
  2. Step 2: Convert to fraction form
    2,421.28/3,632.53 = 689.91/x
  3. Step 3: Cross multiply
    2,421.28x = 3,632.53 × 689.91
  4. Step 4: Simplify right side
    2,421.28x = 2,506,104.72
  5. Step 5: Solve for x
    x = 2,506,104.72/2,421.28
  6. Step 6: Final answer
    x = 1,035.03

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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.