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Finding the Fourth Proportional to 342,208.80, 513,313.20 and 142,462.80

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Solution

The fourth proportional to 342,208.80, 513,313.20 and 142,462.80 is: 213,694.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,208.80 : 513,313.20 = 142,462.80 : x
  2. Step 2: Convert to fraction form
    342,208.80/513,313.20 = 142,462.80/x
  3. Step 3: Cross multiply
    342,208.80x = 513,313.20 × 142,462.80
  4. Step 4: Simplify right side
    342,208.80x = 73,128,035,748.96
  5. Step 5: Solve for x
    x = 73,128,035,748.96/342,208.80
  6. Step 6: Final answer
    x = 213,694.20

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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.