Home / 212,719.80-319,338.90-211,164.60

Finding the Fourth Proportional to 212,719.80, 319,338.90 and 211,164.60

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Solution

The fourth proportional to 212,719.80, 319,338.90 and 211,164.60 is: 317,004.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,719.80 : 319,338.90 = 211,164.60 : x
  2. Step 2: Convert to fraction form
    212,719.80/319,338.90 = 211,164.60/x
  3. Step 3: Cross multiply
    212,719.80x = 319,338.90 × 211,164.60
  4. Step 4: Simplify right side
    212,719.80x = 67,433,071,082.94
  5. Step 5: Solve for x
    x = 67,433,071,082.94/212,719.80
  6. Step 6: Final answer
    x = 317,004.20

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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.