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Finding the Fourth Proportional to 518,659.40, 777,545.28 and 199,040.60

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Solution

The fourth proportional to 518,659.40, 777,545.28 and 199,040.60 is: 298,390.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,659.40 : 777,545.28 = 199,040.60 : x
  2. Step 2: Convert to fraction form
    518,659.40/777,545.28 = 199,040.60/x
  3. Step 3: Cross multiply
    518,659.40x = 777,545.28 × 199,040.60
  4. Step 4: Simplify right side
    518,659.40x = 154,763,079,058.37
  5. Step 5: Solve for x
    x = 154,763,079,058.37/518,659.40
  6. Step 6: Final answer
    x = 298,390.58

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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.