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Finding the Fourth Proportional to 639,092.88, 958,639.64 and 218,372.88

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Solution

The fourth proportional to 639,092.88, 958,639.64 and 218,372.88 is: 327,559.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,092.88 : 958,639.64 = 218,372.88 : x
  2. Step 2: Convert to fraction form
    639,092.88/958,639.64 = 218,372.88/x
  3. Step 3: Cross multiply
    639,092.88x = 958,639.64 × 218,372.88
  4. Step 4: Simplify right side
    639,092.88x = 209,340,899,068.96
  5. Step 5: Solve for x
    x = 209,340,899,068.96/639,092.88
  6. Step 6: Final answer
    x = 327,559.43

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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.