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Finding the Fourth Proportional to 352,445, 486,152.80 and 209,103.56

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Solution

The fourth proportional to 352,445, 486,152.80 and 209,103.56 is: 288,431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,445 : 486,152.80 = 209,103.56 : x
  2. Step 2: Convert to fraction form
    352,445/486,152.80 = 209,103.56/x
  3. Step 3: Cross multiply
    352,445x = 486,152.80 × 209,103.56
  4. Step 4: Simplify right side
    352,445x = 101,656,281,183.97
  5. Step 5: Solve for x
    x = 101,656,281,183.97/352,445
  6. Step 6: Final answer
    x = 288,431.62

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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.