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Finding the Fourth Proportional to 621,371.95, 857,485.12 and 349,439.77

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Solution

The fourth proportional to 621,371.95, 857,485.12 and 349,439.77 is: 482,222.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,371.95 : 857,485.12 = 349,439.77 : x
  2. Step 2: Convert to fraction form
    621,371.95/857,485.12 = 349,439.77/x
  3. Step 3: Cross multiply
    621,371.95x = 857,485.12 × 349,439.77
  4. Step 4: Simplify right side
    621,371.95x = 299,639,397,076.60
  5. Step 5: Solve for x
    x = 299,639,397,076.60/621,371.95
  6. Step 6: Final answer
    x = 482,222.28

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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.