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Finding the Fourth Proportional to 276,429.60, 415,081.80 and 209,944.80

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Solution

The fourth proportional to 276,429.60, 415,081.80 and 209,944.80 is: 315,249.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,429.60 : 415,081.80 = 209,944.80 : x
  2. Step 2: Convert to fraction form
    276,429.60/415,081.80 = 209,944.80/x
  3. Step 3: Cross multiply
    276,429.60x = 415,081.80 × 209,944.80
  4. Step 4: Simplify right side
    276,429.60x = 87,144,265,484.64
  5. Step 5: Solve for x
    x = 87,144,265,484.64/276,429.60
  6. Step 6: Final answer
    x = 315,249.40

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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.