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Finding the Fourth Proportional to 309,310.68, 426,878.70 and 173,367.72

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Solution

The fourth proportional to 309,310.68, 426,878.70 and 173,367.72 is: 239,264.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,310.68 : 426,878.70 = 173,367.72 : x
  2. Step 2: Convert to fraction form
    309,310.68/426,878.70 = 173,367.72/x
  3. Step 3: Cross multiply
    309,310.68x = 426,878.70 × 173,367.72
  4. Step 4: Simplify right side
    309,310.68x = 74,006,986,935.56
  5. Step 5: Solve for x
    x = 74,006,986,935.56/309,310.68
  6. Step 6: Final answer
    x = 239,264.25

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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.