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Finding the Fourth Proportional to 305,389.56, 421,437.69 and 171,253.56

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Solution

The fourth proportional to 305,389.56, 421,437.69 and 171,253.56 is: 236,329.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,389.56 : 421,437.69 = 171,253.56 : x
  2. Step 2: Convert to fraction form
    305,389.56/421,437.69 = 171,253.56/x
  3. Step 3: Cross multiply
    305,389.56x = 421,437.69 × 171,253.56
  4. Step 4: Simplify right side
    305,389.56x = 72,172,704,730.68
  5. Step 5: Solve for x
    x = 72,172,704,730.68/305,389.56
  6. Step 6: Final answer
    x = 236,329.97

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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.