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Finding the Fourth Proportional to 425,887.61, 639,225.07 and 215,673.17

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Solution

The fourth proportional to 425,887.61, 639,225.07 and 215,673.17 is: 323,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,887.61 : 639,225.07 = 215,673.17 : x
  2. Step 2: Convert to fraction form
    425,887.61/639,225.07 = 215,673.17/x
  3. Step 3: Cross multiply
    425,887.61x = 639,225.07 × 215,673.17
  4. Step 4: Simplify right side
    425,887.61x = 137,863,693,455.06
  5. Step 5: Solve for x
    x = 137,863,693,455.06/425,887.61
  6. Step 6: Final answer
    x = 323,709.10

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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.