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Finding the Fourth Proportional to 667,755.90, 921,822.32 and 381,220.63

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Solution

The fourth proportional to 667,755.90, 921,822.32 and 381,220.63 is: 526,266.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,755.90 : 921,822.32 = 381,220.63 : x
  2. Step 2: Convert to fraction form
    667,755.90/921,822.32 = 381,220.63/x
  3. Step 3: Cross multiply
    667,755.90x = 921,822.32 × 381,220.63
  4. Step 4: Simplify right side
    667,755.90x = 351,417,684,226.96
  5. Step 5: Solve for x
    x = 351,417,684,226.96/667,755.90
  6. Step 6: Final answer
    x = 526,266.69

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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.