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Finding the Fourth Proportional to 621,755.90, 857,961.88 and 349,817.79

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Solution

The fourth proportional to 621,755.90, 857,961.88 and 349,817.79 is: 482,714.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,755.90 : 857,961.88 = 349,817.79 : x
  2. Step 2: Convert to fraction form
    621,755.90/857,961.88 = 349,817.79/x
  3. Step 3: Cross multiply
    621,755.90x = 857,961.88 × 349,817.79
  4. Step 4: Simplify right side
    621,755.90x = 300,130,328,765.85
  5. Step 5: Solve for x
    x = 300,130,328,765.85/621,755.90
  6. Step 6: Final answer
    x = 482,714.08

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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.