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Finding the Fourth Proportional to 638,410.98, 881,009.82 and 351,924.78

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Solution

The fourth proportional to 638,410.98, 881,009.82 and 351,924.78 is: 485,657.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,410.98 : 881,009.82 = 351,924.78 : x
  2. Step 2: Convert to fraction form
    638,410.98/881,009.82 = 351,924.78/x
  3. Step 3: Cross multiply
    638,410.98x = 881,009.82 × 351,924.78
  4. Step 4: Simplify right side
    638,410.98x = 310,049,187,081.34
  5. Step 5: Solve for x
    x = 310,049,187,081.34/638,410.98
  6. Step 6: Final answer
    x = 485,657.67

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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.