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Finding the Fourth Proportional to 279,123.60, 418,685.40 and 276,790.80

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Solution

The fourth proportional to 279,123.60, 418,685.40 and 276,790.80 is: 415,186.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,123.60 : 418,685.40 = 276,790.80 : x
  2. Step 2: Convert to fraction form
    279,123.60/418,685.40 = 276,790.80/x
  3. Step 3: Cross multiply
    279,123.60x = 418,685.40 × 276,790.80
  4. Step 4: Simplify right side
    279,123.60x = 115,888,266,814.32
  5. Step 5: Solve for x
    x = 115,888,266,814.32/279,123.60
  6. Step 6: Final answer
    x = 415,186.20

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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.