Home / 919,850.79-1,379,823.87-280,105.11

Finding the Fourth Proportional to 919,850.79, 1,379,823.87 and 280,105.11

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Solution

The fourth proportional to 919,850.79, 1,379,823.87 and 280,105.11 is: 420,172.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,850.79 : 1,379,823.87 = 280,105.11 : x
  2. Step 2: Convert to fraction form
    919,850.79/1,379,823.87 = 280,105.11/x
  3. Step 3: Cross multiply
    919,850.79x = 1,379,823.87 × 280,105.11
  4. Step 4: Simplify right side
    919,850.79x = 386,495,716,886.98
  5. Step 5: Solve for x
    x = 386,495,716,886.98/919,850.79
  6. Step 6: Final answer
    x = 420,172.19

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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.