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Finding the Fourth Proportional to 667,310.63, 920,888.66 and 380,824.56

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Solution

The fourth proportional to 667,310.63, 920,888.66 and 380,824.56 is: 525,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,310.63 : 920,888.66 = 380,824.56 : x
  2. Step 2: Convert to fraction form
    667,310.63/920,888.66 = 380,824.56/x
  3. Step 3: Cross multiply
    667,310.63x = 920,888.66 × 380,824.56
  4. Step 4: Simplify right side
    667,310.63x = 350,697,019,705.55
  5. Step 5: Solve for x
    x = 350,697,019,705.55/667,310.63
  6. Step 6: Final answer
    x = 525,537.89

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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.