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Finding the Fourth Proportional to 308,953.02, 426,343.36 and 172,974.25

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Solution

The fourth proportional to 308,953.02, 426,343.36 and 172,974.25 is: 238,697.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,953.02 : 426,343.36 = 172,974.25 : x
  2. Step 2: Convert to fraction form
    308,953.02/426,343.36 = 172,974.25/x
  3. Step 3: Cross multiply
    308,953.02x = 426,343.36 × 172,974.25
  4. Step 4: Simplify right side
    308,953.02x = 73,746,422,938.48
  5. Step 5: Solve for x
    x = 73,746,422,938.48/308,953.02
  6. Step 6: Final answer
    x = 238,697.85

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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.