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Finding the Fourth Proportional to 312,785.61, 431,643.71 and 169,545.62

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Solution

The fourth proportional to 312,785.61, 431,643.71 and 169,545.62 is: 233,972.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,785.61 : 431,643.71 = 169,545.62 : x
  2. Step 2: Convert to fraction form
    312,785.61/431,643.71 = 169,545.62/x
  3. Step 3: Cross multiply
    312,785.61x = 431,643.71 × 169,545.62
  4. Step 4: Simplify right side
    312,785.61x = 73,183,297,425.10
  5. Step 5: Solve for x
    x = 73,183,297,425.10/312,785.61
  6. Step 6: Final answer
    x = 233,972.71

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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.