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Finding the Fourth Proportional to 342,002.80, 513,004.20 and 128,770.30

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Solution

The fourth proportional to 342,002.80, 513,004.20 and 128,770.30 is: 193,155.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,002.80 : 513,004.20 = 128,770.30 : x
  2. Step 2: Convert to fraction form
    342,002.80/513,004.20 = 128,770.30/x
  3. Step 3: Cross multiply
    342,002.80x = 513,004.20 × 128,770.30
  4. Step 4: Simplify right side
    342,002.80x = 66,059,704,735.26
  5. Step 5: Solve for x
    x = 66,059,704,735.26/342,002.80
  6. Step 6: Final answer
    x = 193,155.45

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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.