Home / 878,123.64-1,317,379.86-279,267.96

Finding the Fourth Proportional to 878,123.64, 1,317,379.86 and 279,267.96

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Solution

The fourth proportional to 878,123.64, 1,317,379.86 and 279,267.96 is: 418,963.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,123.64 : 1,317,379.86 = 279,267.96 : x
  2. Step 2: Convert to fraction form
    878,123.64/1,317,379.86 = 279,267.96/x
  3. Step 3: Cross multiply
    878,123.64x = 1,317,379.86 × 279,267.96
  4. Step 4: Simplify right side
    878,123.64x = 367,901,986,047.29
  5. Step 5: Solve for x
    x = 367,901,986,047.29/878,123.64
  6. Step 6: Final answer
    x = 418,963.76

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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.