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Finding the Fourth Proportional to 628,589.22, 867,471.56 and 342,127.86

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Solution

The fourth proportional to 628,589.22, 867,471.56 and 342,127.86 is: 472,146.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,589.22 : 867,471.56 = 342,127.86 : x
  2. Step 2: Convert to fraction form
    628,589.22/867,471.56 = 342,127.86/x
  3. Step 3: Cross multiply
    628,589.22x = 867,471.56 × 342,127.86
  4. Step 4: Simplify right side
    628,589.22x = 296,786,188,433.66
  5. Step 5: Solve for x
    x = 296,786,188,433.66/628,589.22
  6. Step 6: Final answer
    x = 472,146.48

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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.