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Finding the Fourth Proportional to 621,408.72, 857,535.84 and 349,476.54

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Solution

The fourth proportional to 621,408.72, 857,535.84 and 349,476.54 is: 482,273.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,408.72 : 857,535.84 = 349,476.54 : x
  2. Step 2: Convert to fraction form
    621,408.72/857,535.84 = 349,476.54/x
  3. Step 3: Cross multiply
    621,408.72x = 857,535.84 × 349,476.54
  4. Step 4: Simplify right side
    621,408.72x = 299,688,658,289.19
  5. Step 5: Solve for x
    x = 299,688,658,289.19/621,408.72
  6. Step 6: Final answer
    x = 482,273.02

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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.