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Finding the Fourth Proportional to 639,286.80, 958,584.60 and 265,347.60

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Solution

The fourth proportional to 639,286.80, 958,584.60 and 265,347.60 is: 397,877.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,286.80 : 958,584.60 = 265,347.60 : x
  2. Step 2: Convert to fraction form
    639,286.80/958,584.60 = 265,347.60/x
  3. Step 3: Cross multiply
    639,286.80x = 958,584.60 × 265,347.60
  4. Step 4: Simplify right side
    639,286.80x = 254,358,123,006.96
  5. Step 5: Solve for x
    x = 254,358,123,006.96/639,286.80
  6. Step 6: Final answer
    x = 397,877.95

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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.