Home / 512,865.10-769,439.85-213,486.70

Finding the Fourth Proportional to 512,865.10, 769,439.85 and 213,486.70

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Solution

The fourth proportional to 512,865.10, 769,439.85 and 213,486.70 is: 320,289.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,865.10 : 769,439.85 = 213,486.70 : x
  2. Step 2: Convert to fraction form
    512,865.10/769,439.85 = 213,486.70/x
  3. Step 3: Cross multiply
    512,865.10x = 769,439.85 × 213,486.70
  4. Step 4: Simplify right side
    512,865.10x = 164,265,174,425.00
  5. Step 5: Solve for x
    x = 164,265,174,425.00/512,865.10
  6. Step 6: Final answer
    x = 320,289.24

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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.