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Finding the Fourth Proportional to 425,886.01, 639,113.09 and 220,909.57

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Solution

The fourth proportional to 425,886.01, 639,113.09 and 220,909.57 is: 331,511.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,886.01 : 639,113.09 = 220,909.57 : x
  2. Step 2: Convert to fraction form
    425,886.01/639,113.09 = 220,909.57/x
  3. Step 3: Cross multiply
    425,886.01x = 639,113.09 × 220,909.57
  4. Step 4: Simplify right side
    425,886.01x = 141,186,197,893.27
  5. Step 5: Solve for x
    x = 141,186,197,893.27/425,886.01
  6. Step 6: Final answer
    x = 331,511.71

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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.