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Finding the Fourth Proportional to 2,788.13, 4,182.38 and 813.77

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Solution

The fourth proportional to 2,788.13, 4,182.38 and 813.77 is: 1,220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.13 : 4,182.38 = 813.77 : x
  2. Step 2: Convert to fraction form
    2,788.13/4,182.38 = 813.77/x
  3. Step 3: Cross multiply
    2,788.13x = 4,182.38 × 813.77
  4. Step 4: Simplify right side
    2,788.13x = 3,403,501.24
  5. Step 5: Solve for x
    x = 3,403,501.24/2,788.13
  6. Step 6: Final answer
    x = 1,220.71

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1.5x scale

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.