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Finding the Fourth Proportional to 667,956.90, 921,817.62 and 381,570.06

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Solution

The fourth proportional to 667,956.90, 921,817.62 and 381,570.06 is: 526,587.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,956.90 : 921,817.62 = 381,570.06 : x
  2. Step 2: Convert to fraction form
    667,956.90/921,817.62 = 381,570.06/x
  3. Step 3: Cross multiply
    667,956.90x = 921,817.62 × 381,570.06
  4. Step 4: Simplify right side
    667,956.90x = 351,738,004,572.46
  5. Step 5: Solve for x
    x = 351,738,004,572.46/667,956.90
  6. Step 6: Final answer
    x = 526,587.88

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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.