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Finding the Fourth Proportional to 368,388.48, 508,376.88 and 217,495.20

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Solution

The fourth proportional to 368,388.48, 508,376.88 and 217,495.20 is: 300,143.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,388.48 : 508,376.88 = 217,495.20 : x
  2. Step 2: Convert to fraction form
    368,388.48/508,376.88 = 217,495.20/x
  3. Step 3: Cross multiply
    368,388.48x = 508,376.88 × 217,495.20
  4. Step 4: Simplify right side
    368,388.48x = 110,569,531,190.98
  5. Step 5: Solve for x
    x = 110,569,531,190.98/368,388.48
  6. Step 6: Final answer
    x = 300,143.84

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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.