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Finding the Fourth Proportional to 399,285.53, 551,262.74 and 254,173.22

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Solution

The fourth proportional to 399,285.53, 551,262.74 and 254,173.22 is: 350,917.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,285.53 : 551,262.74 = 254,173.22 : x
  2. Step 2: Convert to fraction form
    399,285.53/551,262.74 = 254,173.22/x
  3. Step 3: Cross multiply
    399,285.53x = 551,262.74 × 254,173.22
  4. Step 4: Simplify right side
    399,285.53x = 140,116,221,664.64
  5. Step 5: Solve for x
    x = 140,116,221,664.64/399,285.53
  6. Step 6: Final answer
    x = 350,917.36

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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.