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Finding the Fourth Proportional to 449,556.48, 620,401.92 and 258,631.68

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Solution

The fourth proportional to 449,556.48, 620,401.92 and 258,631.68 is: 356,919.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,556.48 : 620,401.92 = 258,631.68 : x
  2. Step 2: Convert to fraction form
    449,556.48/620,401.92 = 258,631.68/x
  3. Step 3: Cross multiply
    449,556.48x = 620,401.92 × 258,631.68
  4. Step 4: Simplify right side
    449,556.48x = 160,455,590,844.83
  5. Step 5: Solve for x
    x = 160,455,590,844.83/449,556.48
  6. Step 6: Final answer
    x = 356,919.76

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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.