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Finding the Fourth Proportional to 542,718.24, 748,940.80 and 300,999.68

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Solution

The fourth proportional to 542,718.24, 748,940.80 and 300,999.68 is: 415,373.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,718.24 : 748,940.80 = 300,999.68 : x
  2. Step 2: Convert to fraction form
    542,718.24/748,940.80 = 300,999.68/x
  3. Step 3: Cross multiply
    542,718.24x = 748,940.80 × 300,999.68
  4. Step 4: Simplify right side
    542,718.24x = 225,430,941,138.94
  5. Step 5: Solve for x
    x = 225,430,941,138.94/542,718.24
  6. Step 6: Final answer
    x = 415,373.81

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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.