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Finding the Fourth Proportional to 275,853.80, 413,780.70 and 163,879.40

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Solution

The fourth proportional to 275,853.80, 413,780.70 and 163,879.40 is: 245,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,853.80 : 413,780.70 = 163,879.40 : x
  2. Step 2: Convert to fraction form
    275,853.80/413,780.70 = 163,879.40/x
  3. Step 3: Cross multiply
    275,853.80x = 413,780.70 × 163,879.40
  4. Step 4: Simplify right side
    275,853.80x = 67,810,132,847.58
  5. Step 5: Solve for x
    x = 67,810,132,847.58/275,853.80
  6. Step 6: Final answer
    x = 245,819.10

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1.5x scale

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.