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Finding the Fourth Proportional to 308,756.70, 426,104.79 and 172,802.46

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Solution

The fourth proportional to 308,756.70, 426,104.79 and 172,802.46 is: 238,478.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,756.70 : 426,104.79 = 172,802.46 : x
  2. Step 2: Convert to fraction form
    308,756.70/426,104.79 = 172,802.46/x
  3. Step 3: Cross multiply
    308,756.70x = 426,104.79 × 172,802.46
  4. Step 4: Simplify right side
    308,756.70x = 73,631,955,929.78
  5. Step 5: Solve for x
    x = 73,631,955,929.78/308,756.70
  6. Step 6: Final answer
    x = 238,478.89

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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.