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Finding the Fourth Proportional to 447,807.78, 670,134.06 and 279,407.43

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Solution

The fourth proportional to 447,807.78, 670,134.06 and 279,407.43 is: 418,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,807.78 : 670,134.06 = 279,407.43 : x
  2. Step 2: Convert to fraction form
    447,807.78/670,134.06 = 279,407.43/x
  3. Step 3: Cross multiply
    447,807.78x = 670,134.06 × 279,407.43
  4. Step 4: Simplify right side
    447,807.78x = 187,240,435,460.07
  5. Step 5: Solve for x
    x = 187,240,435,460.07/447,807.78
  6. Step 6: Final answer
    x = 418,126.80

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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.