Home / 331,636.48-497,647.60-139,496.78

Finding the Fourth Proportional to 331,636.48, 497,647.60 and 139,496.78

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Solution

The fourth proportional to 331,636.48, 497,647.60 and 139,496.78 is: 209,326.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,636.48 : 497,647.60 = 139,496.78 : x
  2. Step 2: Convert to fraction form
    331,636.48/497,647.60 = 139,496.78/x
  3. Step 3: Cross multiply
    331,636.48x = 497,647.60 × 139,496.78
  4. Step 4: Simplify right side
    331,636.48x = 69,420,238,670.11
  5. Step 5: Solve for x
    x = 69,420,238,670.11/331,636.48
  6. Step 6: Final answer
    x = 209,326.31

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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.