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Finding the Fourth Proportional to 621,373.08, 857,486.66 and 349,440.90

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Solution

The fourth proportional to 621,373.08, 857,486.66 and 349,440.90 is: 482,223.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,373.08 : 857,486.66 = 349,440.90 : x
  2. Step 2: Convert to fraction form
    621,373.08/857,486.66 = 349,440.90/x
  3. Step 3: Cross multiply
    621,373.08x = 857,486.66 × 349,440.90
  4. Step 4: Simplify right side
    621,373.08x = 299,640,910,208.39
  5. Step 5: Solve for x
    x = 299,640,910,208.39/621,373.08
  6. Step 6: Final answer
    x = 482,223.84

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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.