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Finding the Fourth Proportional to 309,851.39, 427,611.29 and 173,878.31

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Solution

The fourth proportional to 309,851.39, 427,611.29 and 173,878.31 is: 239,961.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,851.39 : 427,611.29 = 173,878.31 : x
  2. Step 2: Convert to fraction form
    309,851.39/427,611.29 = 173,878.31/x
  3. Step 3: Cross multiply
    309,851.39x = 427,611.29 × 173,878.31
  4. Step 4: Simplify right side
    309,851.39x = 74,352,328,641.76
  5. Step 5: Solve for x
    x = 74,352,328,641.76/309,851.39
  6. Step 6: Final answer
    x = 239,961.25

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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.