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Finding the Fourth Proportional to 319,631.70, 479,115.45 and 130,010.70

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Solution

The fourth proportional to 319,631.70, 479,115.45 and 130,010.70 is: 194,880.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,631.70 : 479,115.45 = 130,010.70 : x
  2. Step 2: Convert to fraction form
    319,631.70/479,115.45 = 130,010.70/x
  3. Step 3: Cross multiply
    319,631.70x = 479,115.45 × 130,010.70
  4. Step 4: Simplify right side
    319,631.70x = 62,290,135,035.32
  5. Step 5: Solve for x
    x = 62,290,135,035.32/319,631.70
  6. Step 6: Final answer
    x = 194,880.97

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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.