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Finding the Fourth Proportional to 319,628.20, 479,110.20 and 130,007.20

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Solution

The fourth proportional to 319,628.20, 479,110.20 and 130,007.20 is: 194,875.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,628.20 : 479,110.20 = 130,007.20 : x
  2. Step 2: Convert to fraction form
    319,628.20/479,110.20 = 130,007.20/x
  3. Step 3: Cross multiply
    319,628.20x = 479,110.20 × 130,007.20
  4. Step 4: Simplify right side
    319,628.20x = 62,287,775,593.44
  5. Step 5: Solve for x
    x = 62,287,775,593.44/319,628.20
  6. Step 6: Final answer
    x = 194,875.72

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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.