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Finding the Fourth Proportional to 308,706.48, 426,081.12 and 187,886.68

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Solution

The fourth proportional to 308,706.48, 426,081.12 and 187,886.68 is: 259,323.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,706.48 : 426,081.12 = 187,886.68 : x
  2. Step 2: Convert to fraction form
    308,706.48/426,081.12 = 187,886.68/x
  3. Step 3: Cross multiply
    308,706.48x = 426,081.12 × 187,886.68
  4. Step 4: Simplify right side
    308,706.48x = 80,054,967,047.48
  5. Step 5: Solve for x
    x = 80,054,967,047.48/308,706.48
  6. Step 6: Final answer
    x = 259,323.90

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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.