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Finding the Fourth Proportional to 518,556.40, 776,959.80 and 251,742.40

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Solution

The fourth proportional to 518,556.40, 776,959.80 and 251,742.40 is: 377,188.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,556.40 : 776,959.80 = 251,742.40 : x
  2. Step 2: Convert to fraction form
    518,556.40/776,959.80 = 251,742.40/x
  3. Step 3: Cross multiply
    518,556.40x = 776,959.80 × 251,742.40
  4. Step 4: Simplify right side
    518,556.40x = 195,593,724,755.52
  5. Step 5: Solve for x
    x = 195,593,724,755.52/518,556.40
  6. Step 6: Final answer
    x = 377,188.91

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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.