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Finding the Fourth Proportional to 2,820.71, 4,230.77 and 872.93

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Solution

The fourth proportional to 2,820.71, 4,230.77 and 872.93 is: 1,309.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.71 : 4,230.77 = 872.93 : x
  2. Step 2: Convert to fraction form
    2,820.71/4,230.77 = 872.93/x
  3. Step 3: Cross multiply
    2,820.71x = 4,230.77 × 872.93
  4. Step 4: Simplify right side
    2,820.71x = 3,693,140.54
  5. Step 5: Solve for x
    x = 3,693,140.54/2,820.71
  6. Step 6: Final answer
    x = 1,309.30

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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.