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Finding the Fourth Proportional to 326,810.70, 490,216.05 and 139,841.10

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Solution

The fourth proportional to 326,810.70, 490,216.05 and 139,841.10 is: 209,761.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,810.70 : 490,216.05 = 139,841.10 : x
  2. Step 2: Convert to fraction form
    326,810.70/490,216.05 = 139,841.10/x
  3. Step 3: Cross multiply
    326,810.70x = 490,216.05 × 139,841.10
  4. Step 4: Simplify right side
    326,810.70x = 68,552,351,669.66
  5. Step 5: Solve for x
    x = 68,552,351,669.66/326,810.70
  6. Step 6: Final answer
    x = 209,761.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.