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Finding the Fourth Proportional to 425,399.07, 638,197.87 and 141,068.82

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Solution

The fourth proportional to 425,399.07, 638,197.87 and 141,068.82 is: 211,636.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,399.07 : 638,197.87 = 141,068.82 : x
  2. Step 2: Convert to fraction form
    425,399.07/638,197.87 = 141,068.82/x
  3. Step 3: Cross multiply
    425,399.07x = 638,197.87 × 141,068.82
  4. Step 4: Simplify right side
    425,399.07x = 90,029,823,347.62
  5. Step 5: Solve for x
    x = 90,029,823,347.62/425,399.07
  6. Step 6: Final answer
    x = 211,636.15

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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.