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Finding the Fourth Proportional to 342,138.20, 513,207.30 and 279,930.20

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Solution

The fourth proportional to 342,138.20, 513,207.30 and 279,930.20 is: 419,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,138.20 : 513,207.30 = 279,930.20 : x
  2. Step 2: Convert to fraction form
    342,138.20/513,207.30 = 279,930.20/x
  3. Step 3: Cross multiply
    342,138.20x = 513,207.30 × 279,930.20
  4. Step 4: Simplify right side
    342,138.20x = 143,662,222,130.46
  5. Step 5: Solve for x
    x = 143,662,222,130.46/342,138.20
  6. Step 6: Final answer
    x = 419,895.30

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1.5x scale

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.