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Finding the Fourth Proportional to 259,772.10, 389,658.15 and 256,272.90

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Solution

The fourth proportional to 259,772.10, 389,658.15 and 256,272.90 is: 384,409.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,772.10 : 389,658.15 = 256,272.90 : x
  2. Step 2: Convert to fraction form
    259,772.10/389,658.15 = 256,272.90/x
  3. Step 3: Cross multiply
    259,772.10x = 389,658.15 × 256,272.90
  4. Step 4: Simplify right side
    259,772.10x = 99,858,824,109.14
  5. Step 5: Solve for x
    x = 99,858,824,109.14/259,772.10
  6. Step 6: Final answer
    x = 384,409.35

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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.