Home / 2,851.28-3,935.70-1,672.32

Finding the Fourth Proportional to 2,851.28, 3,935.70 and 1,672.32

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Solution

The fourth proportional to 2,851.28, 3,935.70 and 1,672.32 is: 2,308.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.28 : 3,935.70 = 1,672.32 : x
  2. Step 2: Convert to fraction form
    2,851.28/3,935.70 = 1,672.32/x
  3. Step 3: Cross multiply
    2,851.28x = 3,935.70 × 1,672.32
  4. Step 4: Simplify right side
    2,851.28x = 6,581,749.82
  5. Step 5: Solve for x
    x = 6,581,749.82/2,851.28
  6. Step 6: Final answer
    x = 2,308.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.