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Finding the Fourth Proportional to 667,382.40, 999,889.92 and 554,400

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Solution

The fourth proportional to 667,382.40, 999,889.92 and 554,400 is: 830,616.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,382.40 : 999,889.92 = 554,400 : x
  2. Step 2: Convert to fraction form
    667,382.40/999,889.92 = 554,400/x
  3. Step 3: Cross multiply
    667,382.40x = 999,889.92 × 554,400
  4. Step 4: Simplify right side
    667,382.40x = 554,338,971,648
  5. Step 5: Solve for x
    x = 554,338,971,648/667,382.40
  6. Step 6: Final answer
    x = 830,616.71

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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.