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Finding the Fourth Proportional to 309,336.71, 426,437.34 and 217,175.42

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Solution

The fourth proportional to 309,336.71, 426,437.34 and 217,175.42 is: 299,388.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,336.71 : 426,437.34 = 217,175.42 : x
  2. Step 2: Convert to fraction form
    309,336.71/426,437.34 = 217,175.42/x
  3. Step 3: Cross multiply
    309,336.71x = 426,437.34 × 217,175.42
  4. Step 4: Simplify right side
    309,336.71x = 92,611,706,286.00
  5. Step 5: Solve for x
    x = 92,611,706,286.00/309,336.71
  6. Step 6: Final answer
    x = 299,388.03

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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.