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Finding the Fourth Proportional to 393,145.36, 542,537.84 and 223,379.48

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Solution

The fourth proportional to 393,145.36, 542,537.84 and 223,379.48 is: 308,262.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,145.36 : 542,537.84 = 223,379.48 : x
  2. Step 2: Convert to fraction form
    393,145.36/542,537.84 = 223,379.48/x
  3. Step 3: Cross multiply
    393,145.36x = 542,537.84 × 223,379.48
  4. Step 4: Simplify right side
    393,145.36x = 121,191,820,579.52
  5. Step 5: Solve for x
    x = 121,191,820,579.52/393,145.36
  6. Step 6: Final answer
    x = 308,262.12

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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.