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Finding the Fourth Proportional to 309,894.36, 427,636.24 and 173,915.60

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Solution

The fourth proportional to 309,894.36, 427,636.24 and 173,915.60 is: 239,993.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,894.36 : 427,636.24 = 173,915.60 : x
  2. Step 2: Convert to fraction form
    309,894.36/427,636.24 = 173,915.60/x
  3. Step 3: Cross multiply
    309,894.36x = 427,636.24 × 173,915.60
  4. Step 4: Simplify right side
    309,894.36x = 74,372,613,261.34
  5. Step 5: Solve for x
    x = 74,372,613,261.34/309,894.36
  6. Step 6: Final answer
    x = 239,993.44

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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.