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Finding the Fourth Proportional to 305,960.80, 422,235.30 and 185,124.28

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Solution

The fourth proportional to 305,960.80, 422,235.30 and 185,124.28 is: 255,477.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,960.80 : 422,235.30 = 185,124.28 : x
  2. Step 2: Convert to fraction form
    305,960.80/422,235.30 = 185,124.28/x
  3. Step 3: Cross multiply
    305,960.80x = 422,235.30 × 185,124.28
  4. Step 4: Simplify right side
    305,960.80x = 78,166,005,903.08
  5. Step 5: Solve for x
    x = 78,166,005,903.08/305,960.80
  6. Step 6: Final answer
    x = 255,477.19

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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.