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Finding the Fourth Proportional to 352,916.20, 529,374.30 and 142,445.80

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Solution

The fourth proportional to 352,916.20, 529,374.30 and 142,445.80 is: 213,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,916.20 : 529,374.30 = 142,445.80 : x
  2. Step 2: Convert to fraction form
    352,916.20/529,374.30 = 142,445.80/x
  3. Step 3: Cross multiply
    352,916.20x = 529,374.30 × 142,445.80
  4. Step 4: Simplify right side
    352,916.20x = 75,407,145,662.94
  5. Step 5: Solve for x
    x = 75,407,145,662.94/352,916.20
  6. Step 6: Final answer
    x = 213,668.70

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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.