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Finding the Fourth Proportional to 559,912.20, 772,645.54 and 318,161.22

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Solution

The fourth proportional to 559,912.20, 772,645.54 and 318,161.22 is: 439,043.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,912.20 : 772,645.54 = 318,161.22 : x
  2. Step 2: Convert to fraction form
    559,912.20/772,645.54 = 318,161.22/x
  3. Step 3: Cross multiply
    559,912.20x = 772,645.54 × 318,161.22
  4. Step 4: Simplify right side
    559,912.20x = 245,825,847,633.96
  5. Step 5: Solve for x
    x = 245,825,847,633.96/559,912.20
  6. Step 6: Final answer
    x = 439,043.56

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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.