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Finding the Fourth Proportional to 379,418.70, 570,112.20 and 336,116.10

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Solution

The fourth proportional to 379,418.70, 570,112.20 and 336,116.10 is: 505,045.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,418.70 : 570,112.20 = 336,116.10 : x
  2. Step 2: Convert to fraction form
    379,418.70/570,112.20 = 336,116.10/x
  3. Step 3: Cross multiply
    379,418.70x = 570,112.20 × 336,116.10
  4. Step 4: Simplify right side
    379,418.70x = 191,623,889,226.42
  5. Step 5: Solve for x
    x = 191,623,889,226.42/379,418.70
  6. Step 6: Final answer
    x = 505,045.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.