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Finding the Fourth Proportional to 667,793.89, 921,376.24 and 381,256.93

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Solution

The fourth proportional to 667,793.89, 921,376.24 and 381,256.93 is: 526,032.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,793.89 : 921,376.24 = 381,256.93 : x
  2. Step 2: Convert to fraction form
    667,793.89/921,376.24 = 381,256.93/x
  3. Step 3: Cross multiply
    667,793.89x = 921,376.24 × 381,256.93
  4. Step 4: Simplify right side
    667,793.89x = 351,281,076,637.34
  5. Step 5: Solve for x
    x = 351,281,076,637.34/667,793.89
  6. Step 6: Final answer
    x = 526,032.18

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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.