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Finding the Fourth Proportional to 280,389.52, 387,443.43 and 199,676.92

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Solution

The fourth proportional to 280,389.52, 387,443.43 and 199,676.92 is: 275,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,389.52 : 387,443.43 = 199,676.92 : x
  2. Step 2: Convert to fraction form
    280,389.52/387,443.43 = 199,676.92/x
  3. Step 3: Cross multiply
    280,389.52x = 387,443.43 × 199,676.92
  4. Step 4: Simplify right side
    280,389.52x = 77,363,510,776.64
  5. Step 5: Solve for x
    x = 77,363,510,776.64/280,389.52
  6. Step 6: Final answer
    x = 275,914.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.