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Finding the Fourth Proportional to 305,305.20, 421,303.96 and 169,329.39

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Solution

The fourth proportional to 305,305.20, 421,303.96 and 169,329.39 is: 233,665.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,305.20 : 421,303.96 = 169,329.39 : x
  2. Step 2: Convert to fraction form
    305,305.20/421,303.96 = 169,329.39/x
  3. Step 3: Cross multiply
    305,305.20x = 421,303.96 × 169,329.39
  4. Step 4: Simplify right side
    305,305.20x = 71,339,142,551.38
  5. Step 5: Solve for x
    x = 71,339,142,551.38/305,305.20
  6. Step 6: Final answer
    x = 233,665.01

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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.