Home / 812,698.76-1,219,128.33-280,149.68

Finding the Fourth Proportional to 812,698.76, 1,219,128.33 and 280,149.68

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Solution

The fourth proportional to 812,698.76, 1,219,128.33 and 280,149.68 is: 420,252.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,698.76 : 1,219,128.33 = 280,149.68 : x
  2. Step 2: Convert to fraction form
    812,698.76/1,219,128.33 = 280,149.68/x
  3. Step 3: Cross multiply
    812,698.76x = 1,219,128.33 × 280,149.68
  4. Step 4: Simplify right side
    812,698.76x = 341,538,411,528.43
  5. Step 5: Solve for x
    x = 341,538,411,528.43/812,698.76
  6. Step 6: Final answer
    x = 420,252.16

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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.