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Finding the Fourth Proportional to 485,215, 669,601.09 and 267,431.41

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Solution

The fourth proportional to 485,215, 669,601.09 and 267,431.41 is: 369,057.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,215 : 669,601.09 = 267,431.41 : x
  2. Step 2: Convert to fraction form
    485,215/669,601.09 = 267,431.41/x
  3. Step 3: Cross multiply
    485,215x = 669,601.09 × 267,431.41
  4. Step 4: Simplify right side
    485,215x = 179,072,363,636.24
  5. Step 5: Solve for x
    x = 179,072,363,636.24/485,215
  6. Step 6: Final answer
    x = 369,057.77

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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.