Home / 679,310.28-1,019,423.64-279,942.20

Finding the Fourth Proportional to 679,310.28, 1,019,423.64 and 279,942.20

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Solution

The fourth proportional to 679,310.28, 1,019,423.64 and 279,942.20 is: 420,102.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,310.28 : 1,019,423.64 = 279,942.20 : x
  2. Step 2: Convert to fraction form
    679,310.28/1,019,423.64 = 279,942.20/x
  3. Step 3: Cross multiply
    679,310.28x = 1,019,423.64 × 279,942.20
  4. Step 4: Simplify right side
    679,310.28x = 285,379,696,513.61
  5. Step 5: Solve for x
    x = 285,379,696,513.61/679,310.28
  6. Step 6: Final answer
    x = 420,102.13

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1.5x scale

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.