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Finding the Fourth Proportional to 621,641.36, 857,863.74 and 349,709.42

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Solution

The fourth proportional to 621,641.36, 857,863.74 and 349,709.42 is: 482,598.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,641.36 : 857,863.74 = 349,709.42 : x
  2. Step 2: Convert to fraction form
    621,641.36/857,863.74 = 349,709.42/x
  3. Step 3: Cross multiply
    621,641.36x = 857,863.74 × 349,709.42
  4. Step 4: Simplify right side
    621,641.36x = 300,003,030,954.43
  5. Step 5: Solve for x
    x = 300,003,030,954.43/621,641.36
  6. Step 6: Final answer
    x = 482,598.25

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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.