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Finding the Fourth Proportional to 319,878.09, 479,789.22 and 130,358.34

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Solution

The fourth proportional to 319,878.09, 479,789.22 and 130,358.34 is: 195,526.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,878.09 : 479,789.22 = 130,358.34 : x
  2. Step 2: Convert to fraction form
    319,878.09/479,789.22 = 130,358.34/x
  3. Step 3: Cross multiply
    319,878.09x = 479,789.22 × 130,358.34
  4. Step 4: Simplify right side
    319,878.09x = 62,544,526,269.09
  5. Step 5: Solve for x
    x = 62,544,526,269.09/319,878.09
  6. Step 6: Final answer
    x = 195,526.13

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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.