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Finding the Fourth Proportional to 620,249.76, 855,720.72 and 351,822.24

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Solution

The fourth proportional to 620,249.76, 855,720.72 and 351,822.24 is: 485,387.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,249.76 : 855,720.72 = 351,822.24 : x
  2. Step 2: Convert to fraction form
    620,249.76/855,720.72 = 351,822.24/x
  3. Step 3: Cross multiply
    620,249.76x = 855,720.72 × 351,822.24
  4. Step 4: Simplify right side
    620,249.76x = 301,061,580,524.81
  5. Step 5: Solve for x
    x = 301,061,580,524.81/620,249.76
  6. Step 6: Final answer
    x = 485,387.66

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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.