Home / 345,385.99-518,134.39-145,735.79

Finding the Fourth Proportional to 345,385.99, 518,134.39 and 145,735.79

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Solution

The fourth proportional to 345,385.99, 518,134.39 and 145,735.79 is: 218,627.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,385.99 : 518,134.39 = 145,735.79 : x
  2. Step 2: Convert to fraction form
    345,385.99/518,134.39 = 145,735.79/x
  3. Step 3: Cross multiply
    345,385.99x = 518,134.39 × 145,735.79
  4. Step 4: Simplify right side
    345,385.99x = 75,510,721,726.25
  5. Step 5: Solve for x
    x = 75,510,721,726.25/345,385.99
  6. Step 6: Final answer
    x = 218,627.05

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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.