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Finding the Fourth Proportional to 606,422.80, 909,634.20 and 212,438.80

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Solution

The fourth proportional to 606,422.80, 909,634.20 and 212,438.80 is: 318,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,422.80 : 909,634.20 = 212,438.80 : x
  2. Step 2: Convert to fraction form
    606,422.80/909,634.20 = 212,438.80/x
  3. Step 3: Cross multiply
    606,422.80x = 909,634.20 × 212,438.80
  4. Step 4: Simplify right side
    606,422.80x = 193,241,597,886.96
  5. Step 5: Solve for x
    x = 193,241,597,886.96/606,422.80
  6. Step 6: Final answer
    x = 318,658.20

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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.