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Finding the Fourth Proportional to 911,458.40, 1,367,252.40 and 280,371.20

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Solution

The fourth proportional to 911,458.40, 1,367,252.40 and 280,371.20 is: 420,576.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,458.40 : 1,367,252.40 = 280,371.20 : x
  2. Step 2: Convert to fraction form
    911,458.40/1,367,252.40 = 280,371.20/x
  3. Step 3: Cross multiply
    911,458.40x = 1,367,252.40 × 280,371.20
  4. Step 4: Simplify right side
    911,458.40x = 383,338,196,090.88
  5. Step 5: Solve for x
    x = 383,338,196,090.88/911,458.40
  6. Step 6: Final answer
    x = 420,576.73

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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.