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Finding the Fourth Proportional to 420,645.82, 580,488.20 and 229,659.21

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Solution

The fourth proportional to 420,645.82, 580,488.20 and 229,659.21 is: 316,928.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,645.82 : 580,488.20 = 229,659.21 : x
  2. Step 2: Convert to fraction form
    420,645.82/580,488.20 = 229,659.21/x
  3. Step 3: Cross multiply
    420,645.82x = 580,488.20 × 229,659.21
  4. Step 4: Simplify right side
    420,645.82x = 133,314,457,375.59
  5. Step 5: Solve for x
    x = 133,314,457,375.59/420,645.82
  6. Step 6: Final answer
    x = 316,928.05

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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.