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Finding the Fourth Proportional to 293,143.80, 439,715.70 and 198,665.40

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Solution

The fourth proportional to 293,143.80, 439,715.70 and 198,665.40 is: 297,998.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,143.80 : 439,715.70 = 198,665.40 : x
  2. Step 2: Convert to fraction form
    293,143.80/439,715.70 = 198,665.40/x
  3. Step 3: Cross multiply
    293,143.80x = 439,715.70 × 198,665.40
  4. Step 4: Simplify right side
    293,143.80x = 87,356,295,426.78
  5. Step 5: Solve for x
    x = 87,356,295,426.78/293,143.80
  6. Step 6: Final answer
    x = 297,998.10

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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.