Home / 1,421.69-2,132.99-836.57

Finding the Fourth Proportional to 1,421.69, 2,132.99 and 836.57

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Solution

The fourth proportional to 1,421.69, 2,132.99 and 836.57 is: 1,255.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.69 : 2,132.99 = 836.57 : x
  2. Step 2: Convert to fraction form
    1,421.69/2,132.99 = 836.57/x
  3. Step 3: Cross multiply
    1,421.69x = 2,132.99 × 836.57
  4. Step 4: Simplify right side
    1,421.69x = 1,784,402.87
  5. Step 5: Solve for x
    x = 1,784,402.87/1,421.69
  6. Step 6: Final answer
    x = 1,255.13

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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.