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Finding the Fourth Proportional to 304,815.12, 420,644.20 and 170,679.12

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Solution

The fourth proportional to 304,815.12, 420,644.20 and 170,679.12 is: 235,536.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,815.12 : 420,644.20 = 170,679.12 : x
  2. Step 2: Convert to fraction form
    304,815.12/420,644.20 = 170,679.12/x
  3. Step 3: Cross multiply
    304,815.12x = 420,644.20 × 170,679.12
  4. Step 4: Simplify right side
    304,815.12x = 71,795,181,889.10
  5. Step 5: Solve for x
    x = 71,795,181,889.10/304,815.12
  6. Step 6: Final answer
    x = 235,536.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.