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Finding the Fourth Proportional to 309,893.91, 427,635.63 and 173,915.16

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Solution

The fourth proportional to 309,893.91, 427,635.63 and 173,915.16 is: 239,992.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,893.91 : 427,635.63 = 173,915.16 : x
  2. Step 2: Convert to fraction form
    309,893.91/427,635.63 = 173,915.16/x
  3. Step 3: Cross multiply
    309,893.91x = 427,635.63 × 173,915.16
  4. Step 4: Simplify right side
    309,893.91x = 74,372,319,013.15
  5. Step 5: Solve for x
    x = 74,372,319,013.15/309,893.91
  6. Step 6: Final answer
    x = 239,992.84

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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.