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Finding the Fourth Proportional to 308,545.31, 425,831.97 and 172,586.81

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Solution

The fourth proportional to 308,545.31, 425,831.97 and 172,586.81 is: 238,191.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,545.31 : 425,831.97 = 172,586.81 : x
  2. Step 2: Convert to fraction form
    308,545.31/425,831.97 = 172,586.81/x
  3. Step 3: Cross multiply
    308,545.31x = 425,831.97 × 172,586.81
  4. Step 4: Simplify right side
    308,545.31x = 73,492,981,298.32
  5. Step 5: Solve for x
    x = 73,492,981,298.32/308,545.31
  6. Step 6: Final answer
    x = 238,191.86

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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.