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Finding the Fourth Proportional to 308,545.29, 425,831.94 and 172,586.79

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Solution

The fourth proportional to 308,545.29, 425,831.94 and 172,586.79 is: 238,191.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,545.29 : 425,831.94 = 172,586.79 : x
  2. Step 2: Convert to fraction form
    308,545.29/425,831.94 = 172,586.79/x
  3. Step 3: Cross multiply
    308,545.29x = 425,831.94 × 172,586.79
  4. Step 4: Simplify right side
    308,545.29x = 73,492,967,604.07
  5. Step 5: Solve for x
    x = 73,492,967,604.07/308,545.29
  6. Step 6: Final answer
    x = 238,191.83

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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.