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Finding the Fourth Proportional to 393,720.19, 543,501.80 and 264,733.43

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Solution

The fourth proportional to 393,720.19, 543,501.80 and 264,733.43 is: 365,445.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,720.19 : 543,501.80 = 264,733.43 : x
  2. Step 2: Convert to fraction form
    393,720.19/543,501.80 = 264,733.43/x
  3. Step 3: Cross multiply
    393,720.19x = 543,501.80 × 264,733.43
  4. Step 4: Simplify right side
    393,720.19x = 143,883,092,676.75
  5. Step 5: Solve for x
    x = 143,883,092,676.75/393,720.19
  6. Step 6: Final answer
    x = 365,445.05

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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.