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Finding the Fourth Proportional to 352,912.60, 528,591.30 and 212,426.20

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Solution

The fourth proportional to 352,912.60, 528,591.30 and 212,426.20 is: 318,171.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,912.60 : 528,591.30 = 212,426.20 : x
  2. Step 2: Convert to fraction form
    352,912.60/528,591.30 = 212,426.20/x
  3. Step 3: Cross multiply
    352,912.60x = 528,591.30 × 212,426.20
  4. Step 4: Simplify right side
    352,912.60x = 112,286,641,212.06
  5. Step 5: Solve for x
    x = 112,286,641,212.06/352,912.60
  6. Step 6: Final answer
    x = 318,171.24

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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.