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Finding the Fourth Proportional to 305,961.60, 422,213.28 and 170,005.08

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Solution

The fourth proportional to 305,961.60, 422,213.28 and 170,005.08 is: 234,599.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,961.60 : 422,213.28 = 170,005.08 : x
  2. Step 2: Convert to fraction form
    305,961.60/422,213.28 = 170,005.08/x
  3. Step 3: Cross multiply
    305,961.60x = 422,213.28 × 170,005.08
  4. Step 4: Simplify right side
    305,961.60x = 71,778,402,443.46
  5. Step 5: Solve for x
    x = 71,778,402,443.46/305,961.60
  6. Step 6: Final answer
    x = 234,599.38

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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.