Home / 345,699.20-518,548.80-215,904.80

Finding the Fourth Proportional to 345,699.20, 518,548.80 and 215,904.80

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Solution

The fourth proportional to 345,699.20, 518,548.80 and 215,904.80 is: 323,857.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,699.20 : 518,548.80 = 215,904.80 : x
  2. Step 2: Convert to fraction form
    345,699.20/518,548.80 = 215,904.80/x
  3. Step 3: Cross multiply
    345,699.20x = 518,548.80 × 215,904.80
  4. Step 4: Simplify right side
    345,699.20x = 111,957,174,954.24
  5. Step 5: Solve for x
    x = 111,957,174,954.24/345,699.20
  6. Step 6: Final answer
    x = 323,857.20

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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.