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Finding the Fourth Proportional to 555,086.80, 766,022.52 and 313,379.20

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Solution

The fourth proportional to 555,086.80, 766,022.52 and 313,379.20 is: 432,464.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,086.80 : 766,022.52 = 313,379.20 : x
  2. Step 2: Convert to fraction form
    555,086.80/766,022.52 = 313,379.20/x
  3. Step 3: Cross multiply
    555,086.80x = 766,022.52 × 313,379.20
  4. Step 4: Simplify right side
    555,086.80x = 240,055,524,499.58
  5. Step 5: Solve for x
    x = 240,055,524,499.58/555,086.80
  6. Step 6: Final answer
    x = 432,464.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.