Home / 425,899.62-639,243.08-215,685.18

Finding the Fourth Proportional to 425,899.62, 639,243.08 and 215,685.18

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Solution

The fourth proportional to 425,899.62, 639,243.08 and 215,685.18 is: 323,727.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,899.62 : 639,243.08 = 215,685.18 : x
  2. Step 2: Convert to fraction form
    425,899.62/639,243.08 = 215,685.18/x
  3. Step 3: Cross multiply
    425,899.62x = 639,243.08 × 215,685.18
  4. Step 4: Simplify right side
    425,899.62x = 137,875,258,773.55
  5. Step 5: Solve for x
    x = 137,875,258,773.55/425,899.62
  6. Step 6: Final answer
    x = 323,727.12

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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.