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Finding the Fourth Proportional to 312,660.61, 431,473.15 and 169,420.92

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Solution

The fourth proportional to 312,660.61, 431,473.15 and 169,420.92 is: 233,801.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,660.61 : 431,473.15 = 169,420.92 : x
  2. Step 2: Convert to fraction form
    312,660.61/431,473.15 = 169,420.92/x
  3. Step 3: Cross multiply
    312,660.61x = 431,473.15 × 169,420.92
  4. Step 4: Simplify right side
    312,660.61x = 73,100,578,028.30
  5. Step 5: Solve for x
    x = 73,100,578,028.30/312,660.61
  6. Step 6: Final answer
    x = 233,801.69

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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.