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Finding the Fourth Proportional to 280,637.96, 387,298.20 and 159,789.80

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Solution

The fourth proportional to 280,637.96, 387,298.20 and 159,789.80 is: 220,520.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,637.96 : 387,298.20 = 159,789.80 : x
  2. Step 2: Convert to fraction form
    280,637.96/387,298.20 = 159,789.80/x
  3. Step 3: Cross multiply
    280,637.96x = 387,298.20 × 159,789.80
  4. Step 4: Simplify right side
    280,637.96x = 61,886,299,981.87
  5. Step 5: Solve for x
    x = 61,886,299,981.87/280,637.96
  6. Step 6: Final answer
    x = 220,520.06

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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.