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Finding the Fourth Proportional to 309,530.73, 427,170.20 and 173,608.28

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Solution

The fourth proportional to 309,530.73, 427,170.20 and 173,608.28 is: 239,589.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,530.73 : 427,170.20 = 173,608.28 : x
  2. Step 2: Convert to fraction form
    309,530.73/427,170.20 = 173,608.28/x
  3. Step 3: Cross multiply
    309,530.73x = 427,170.20 × 173,608.28
  4. Step 4: Simplify right side
    309,530.73x = 74,160,283,689.26
  5. Step 5: Solve for x
    x = 74,160,283,689.26/309,530.73
  6. Step 6: Final answer
    x = 239,589.41

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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.