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Finding the Fourth Proportional to 395,299.40, 593,006.62 and 128,994.36

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Solution

The fourth proportional to 395,299.40, 593,006.62 and 128,994.36 is: 193,510.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,299.40 : 593,006.62 = 128,994.36 : x
  2. Step 2: Convert to fraction form
    395,299.40/593,006.62 = 128,994.36/x
  3. Step 3: Cross multiply
    395,299.40x = 593,006.62 × 128,994.36
  4. Step 4: Simplify right side
    395,299.40x = 76,494,509,422.66
  5. Step 5: Solve for x
    x = 76,494,509,422.66/395,299.40
  6. Step 6: Final answer
    x = 193,510.31

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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.