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Finding the Fourth Proportional to 279,931.80, 419,897.70 and 269,434.20

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Solution

The fourth proportional to 279,931.80, 419,897.70 and 269,434.20 is: 404,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,931.80 : 419,897.70 = 269,434.20 : x
  2. Step 2: Convert to fraction form
    279,931.80/419,897.70 = 269,434.20/x
  3. Step 3: Cross multiply
    279,931.80x = 419,897.70 × 269,434.20
  4. Step 4: Simplify right side
    279,931.80x = 113,134,800,881.34
  5. Step 5: Solve for x
    x = 113,134,800,881.34/279,931.80
  6. Step 6: Final answer
    x = 404,151.30

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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.