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Finding the Fourth Proportional to 667,792.89, 921,374.87 and 381,255.93

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Solution

The fourth proportional to 667,792.89, 921,374.87 and 381,255.93 is: 526,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,792.89 : 921,374.87 = 381,255.93 : x
  2. Step 2: Convert to fraction form
    667,792.89/921,374.87 = 381,255.93/x
  3. Step 3: Cross multiply
    667,792.89x = 921,374.87 × 381,255.93
  4. Step 4: Simplify right side
    667,792.89x = 351,279,631,034.20
  5. Step 5: Solve for x
    x = 351,279,631,034.20/667,792.89
  6. Step 6: Final answer
    x = 526,030.80

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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.