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Finding the Fourth Proportional to 305,859.60, 458,789.40 and 211,381.20

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Solution

The fourth proportional to 305,859.60, 458,789.40 and 211,381.20 is: 317,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,859.60 : 458,789.40 = 211,381.20 : x
  2. Step 2: Convert to fraction form
    305,859.60/458,789.40 = 211,381.20/x
  3. Step 3: Cross multiply
    305,859.60x = 458,789.40 × 211,381.20
  4. Step 4: Simplify right side
    305,859.60x = 96,979,453,919.28
  5. Step 5: Solve for x
    x = 96,979,453,919.28/305,859.60
  6. Step 6: Final answer
    x = 317,071.80

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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.