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Finding the Fourth Proportional to 485,388.62, 728,033.72 and 130,356.51

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Solution

The fourth proportional to 485,388.62, 728,033.72 and 130,356.51 is: 195,521.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,388.62 : 728,033.72 = 130,356.51 : x
  2. Step 2: Convert to fraction form
    485,388.62/728,033.72 = 130,356.51/x
  3. Step 3: Cross multiply
    485,388.62x = 728,033.72 × 130,356.51
  4. Step 4: Simplify right side
    485,388.62x = 94,903,934,249.73
  5. Step 5: Solve for x
    x = 94,903,934,249.73/485,388.62
  6. Step 6: Final answer
    x = 195,521.55

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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.