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Finding the Fourth Proportional to 338,902.99, 508,355.39 and 139,083.18

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Solution

The fourth proportional to 338,902.99, 508,355.39 and 139,083.18 is: 208,625.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,902.99 : 508,355.39 = 139,083.18 : x
  2. Step 2: Convert to fraction form
    338,902.99/508,355.39 = 139,083.18/x
  3. Step 3: Cross multiply
    338,902.99x = 508,355.39 × 139,083.18
  4. Step 4: Simplify right side
    338,902.99x = 70,703,682,652.72
  5. Step 5: Solve for x
    x = 70,703,682,652.72/338,902.99
  6. Step 6: Final answer
    x = 208,625.14

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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.