Home / 2,857.20-4,283.10-1,688.10

Finding the Fourth Proportional to 2,857.20, 4,283.10 and 1,688.10

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Solution

The fourth proportional to 2,857.20, 4,283.10 and 1,688.10 is: 2,530.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.20 : 4,283.10 = 1,688.10 : x
  2. Step 2: Convert to fraction form
    2,857.20/4,283.10 = 1,688.10/x
  3. Step 3: Cross multiply
    2,857.20x = 4,283.10 × 1,688.10
  4. Step 4: Simplify right side
    2,857.20x = 7,230,301.11
  5. Step 5: Solve for x
    x = 7,230,301.11/2,857.20
  6. Step 6: Final answer
    x = 2,530.55

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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.