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Finding the Fourth Proportional to 305,039.54, 420,979.77 and 169,116.12

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Solution

The fourth proportional to 305,039.54, 420,979.77 and 169,116.12 is: 233,394.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,039.54 : 420,979.77 = 169,116.12 : x
  2. Step 2: Convert to fraction form
    305,039.54/420,979.77 = 169,116.12/x
  3. Step 3: Cross multiply
    305,039.54x = 420,979.77 × 169,116.12
  4. Step 4: Simplify right side
    305,039.54x = 71,194,465,300.89
  5. Step 5: Solve for x
    x = 71,194,465,300.89/305,039.54
  6. Step 6: Final answer
    x = 233,394.22

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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.