Home / 345,936.10-518,904.15-212,383.30

Finding the Fourth Proportional to 345,936.10, 518,904.15 and 212,383.30

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Solution

The fourth proportional to 345,936.10, 518,904.15 and 212,383.30 is: 318,574.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,936.10 : 518,904.15 = 212,383.30 : x
  2. Step 2: Convert to fraction form
    345,936.10/518,904.15 = 212,383.30/x
  3. Step 3: Cross multiply
    345,936.10x = 518,904.15 × 212,383.30
  4. Step 4: Simplify right side
    345,936.10x = 110,206,575,760.70
  5. Step 5: Solve for x
    x = 110,206,575,760.70/345,936.10
  6. Step 6: Final answer
    x = 318,574.95

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Double scale
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Similar ratio
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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.