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Finding the Fourth Proportional to 352,355.20, 528,689.40 and 142,403.20

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Solution

The fourth proportional to 352,355.20, 528,689.40 and 142,403.20 is: 213,668.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,355.20 : 528,689.40 = 142,403.20 : x
  2. Step 2: Convert to fraction form
    352,355.20/528,689.40 = 142,403.20/x
  3. Step 3: Cross multiply
    352,355.20x = 528,689.40 × 142,403.20
  4. Step 4: Simplify right side
    352,355.20x = 75,287,062,366.08
  5. Step 5: Solve for x
    x = 75,287,062,366.08/352,355.20
  6. Step 6: Final answer
    x = 213,668.09

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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.