Home / 2,820.07-4,230.15-872.25

Finding the Fourth Proportional to 2,820.07, 4,230.15 and 872.25

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Solution

The fourth proportional to 2,820.07, 4,230.15 and 872.25 is: 1,308.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.07 : 4,230.15 = 872.25 : x
  2. Step 2: Convert to fraction form
    2,820.07/4,230.15 = 872.25/x
  3. Step 3: Cross multiply
    2,820.07x = 4,230.15 × 872.25
  4. Step 4: Simplify right side
    2,820.07x = 3,689,748.34
  5. Step 5: Solve for x
    x = 3,689,748.34/2,820.07
  6. Step 6: Final answer
    x = 1,308.39

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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.