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Finding the Fourth Proportional to 393,161.37, 542,559.87 and 223,395.51

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Solution

The fourth proportional to 393,161.37, 542,559.87 and 223,395.51 is: 308,284.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,161.37 : 542,559.87 = 223,395.51 : x
  2. Step 2: Convert to fraction form
    393,161.37/542,559.87 = 223,395.51/x
  3. Step 3: Cross multiply
    393,161.37x = 542,559.87 × 223,395.51
  4. Step 4: Simplify right side
    393,161.37x = 121,205,438,864.18
  5. Step 5: Solve for x
    x = 121,205,438,864.18/393,161.37
  6. Step 6: Final answer
    x = 308,284.20

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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.