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Finding the Fourth Proportional to 621,625.78, 857,783.41 and 349,787.76

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Solution

The fourth proportional to 621,625.78, 857,783.41 and 349,787.76 is: 482,673.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,625.78 : 857,783.41 = 349,787.76 : x
  2. Step 2: Convert to fraction form
    621,625.78/857,783.41 = 349,787.76/x
  3. Step 3: Cross multiply
    621,625.78x = 857,783.41 × 349,787.76
  4. Step 4: Simplify right side
    621,625.78x = 300,042,137,549.06
  5. Step 5: Solve for x
    x = 300,042,137,549.06/621,625.78
  6. Step 6: Final answer
    x = 482,673.25

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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.