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Finding the Fourth Proportional to 445,230.81, 667,839.15 and 141,620.67

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Solution

The fourth proportional to 445,230.81, 667,839.15 and 141,620.67 is: 212,428.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,230.81 : 667,839.15 = 141,620.67 : x
  2. Step 2: Convert to fraction form
    445,230.81/667,839.15 = 141,620.67/x
  3. Step 3: Cross multiply
    445,230.81x = 667,839.15 × 141,620.67
  4. Step 4: Simplify right side
    445,230.81x = 94,579,827,875.23
  5. Step 5: Solve for x
    x = 94,579,827,875.23/445,230.81
  6. Step 6: Final answer
    x = 212,428.76

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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.