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Finding the Fourth Proportional to 259,640.64, 389,460.96 and 207,382.28

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Solution

The fourth proportional to 259,640.64, 389,460.96 and 207,382.28 is: 311,073.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,640.64 : 389,460.96 = 207,382.28 : x
  2. Step 2: Convert to fraction form
    259,640.64/389,460.96 = 207,382.28/x
  3. Step 3: Cross multiply
    259,640.64x = 389,460.96 × 207,382.28
  4. Step 4: Simplify right side
    259,640.64x = 80,767,299,908.48
  5. Step 5: Solve for x
    x = 80,767,299,908.48/259,640.64
  6. Step 6: Final answer
    x = 311,073.41

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Similar ratio
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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.