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Finding the Fourth Proportional to 621,321.63, 857,316.92 and 349,351.77

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Solution

The fourth proportional to 621,321.63, 857,316.92 and 349,351.77 is: 482,045.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,321.63 : 857,316.92 = 349,351.77 : x
  2. Step 2: Convert to fraction form
    621,321.63/857,316.92 = 349,351.77/x
  3. Step 3: Cross multiply
    621,321.63x = 857,316.92 × 349,351.77
  4. Step 4: Simplify right side
    621,321.63x = 299,505,183,452.95
  5. Step 5: Solve for x
    x = 299,505,183,452.95/621,321.63
  6. Step 6: Final answer
    x = 482,045.32

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1.5x scale

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.