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Finding the Fourth Proportional to 312,658.61, 431,470.39 and 169,418.92

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Solution

The fourth proportional to 312,658.61, 431,470.39 and 169,418.92 is: 233,798.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,658.61 : 431,470.39 = 169,418.92 : x
  2. Step 2: Convert to fraction form
    312,658.61/431,470.39 = 169,418.92/x
  3. Step 3: Cross multiply
    312,658.61x = 431,470.39 × 169,418.92
  4. Step 4: Simplify right side
    312,658.61x = 73,099,247,485.78
  5. Step 5: Solve for x
    x = 73,099,247,485.78/312,658.61
  6. Step 6: Final answer
    x = 233,798.93

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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.