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Finding the Fourth Proportional to 425,940.76, 638,843.41 and 141,607.68

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Solution

The fourth proportional to 425,940.76, 638,843.41 and 141,607.68 is: 212,389.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,940.76 : 638,843.41 = 141,607.68 : x
  2. Step 2: Convert to fraction form
    425,940.76/638,843.41 = 141,607.68/x
  3. Step 3: Cross multiply
    425,940.76x = 638,843.41 × 141,607.68
  4. Step 4: Simplify right side
    425,940.76x = 90,465,133,173.39
  5. Step 5: Solve for x
    x = 90,465,133,173.39/425,940.76
  6. Step 6: Final answer
    x = 212,389.00

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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.