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Finding the Fourth Proportional to 420,435, 580,212.60 and 229,460.64

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Solution

The fourth proportional to 420,435, 580,212.60 and 229,460.64 is: 316,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,435 : 580,212.60 = 229,460.64 : x
  2. Step 2: Convert to fraction form
    420,435/580,212.60 = 229,460.64/x
  3. Step 3: Cross multiply
    420,435x = 580,212.60 × 229,460.64
  4. Step 4: Simplify right side
    420,435x = 133,135,954,532.06
  5. Step 5: Solve for x
    x = 133,135,954,532.06/420,435
  6. Step 6: Final answer
    x = 316,662.40

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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.