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Finding the Fourth Proportional to 352,340.20, 528,542.70 and 99,620.20

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Solution

The fourth proportional to 352,340.20, 528,542.70 and 99,620.20 is: 149,439.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,340.20 : 528,542.70 = 99,620.20 : x
  2. Step 2: Convert to fraction form
    352,340.20/528,542.70 = 99,620.20/x
  3. Step 3: Cross multiply
    352,340.20x = 528,542.70 × 99,620.20
  4. Step 4: Simplify right side
    352,340.20x = 52,653,529,482.54
  5. Step 5: Solve for x
    x = 52,653,529,482.54/352,340.20
  6. Step 6: Final answer
    x = 149,439.46

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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.