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Finding the Fourth Proportional to 393,066.88, 542,434.12 and 223,310.32

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Solution

The fourth proportional to 393,066.88, 542,434.12 and 223,310.32 is: 308,169.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,066.88 : 542,434.12 = 223,310.32 : x
  2. Step 2: Convert to fraction form
    393,066.88/542,434.12 = 223,310.32/x
  3. Step 3: Cross multiply
    393,066.88x = 542,434.12 × 223,310.32
  4. Step 4: Simplify right side
    393,066.88x = 121,131,136,916.12
  5. Step 5: Solve for x
    x = 121,131,136,916.12/393,066.88
  6. Step 6: Final answer
    x = 308,169.28

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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.