Home / 345,840.24-518,840.55-135,480

Finding the Fourth Proportional to 345,840.24, 518,840.55 and 135,480

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Solution

The fourth proportional to 345,840.24, 518,840.55 and 135,480 is: 203,251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,840.24 : 518,840.55 = 135,480 : x
  2. Step 2: Convert to fraction form
    345,840.24/518,840.55 = 135,480/x
  3. Step 3: Cross multiply
    345,840.24x = 518,840.55 × 135,480
  4. Step 4: Simplify right side
    345,840.24x = 70,292,517,714
  5. Step 5: Solve for x
    x = 70,292,517,714/345,840.24
  6. Step 6: Final answer
    x = 203,251.41

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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.