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Finding the Fourth Proportional to 638,311.77, 880,859.34 and 351,858.51

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Solution

The fourth proportional to 638,311.77, 880,859.34 and 351,858.51 is: 485,558.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,311.77 : 880,859.34 = 351,858.51 : x
  2. Step 2: Convert to fraction form
    638,311.77/880,859.34 = 351,858.51/x
  3. Step 3: Cross multiply
    638,311.77x = 880,859.34 × 351,858.51
  4. Step 4: Simplify right side
    638,311.77x = 309,937,854,891.98
  5. Step 5: Solve for x
    x = 309,937,854,891.98/638,311.77
  6. Step 6: Final answer
    x = 485,558.73

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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.