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Finding the Fourth Proportional to 485,719.28, 670,268 and 267,965.84

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Solution

The fourth proportional to 485,719.28, 670,268 and 267,965.84 is: 369,779.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,719.28 : 670,268 = 267,965.84 : x
  2. Step 2: Convert to fraction form
    485,719.28/670,268 = 267,965.84/x
  3. Step 3: Cross multiply
    485,719.28x = 670,268 × 267,965.84
  4. Step 4: Simplify right side
    485,719.28x = 179,608,927,645.12
  5. Step 5: Solve for x
    x = 179,608,927,645.12/485,719.28
  6. Step 6: Final answer
    x = 369,779.28

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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.