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Finding the Fourth Proportional to 667,749.66, 921,813.64 and 381,214.32

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Solution

The fourth proportional to 667,749.66, 921,813.64 and 381,214.32 is: 526,257.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,749.66 : 921,813.64 = 381,214.32 : x
  2. Step 2: Convert to fraction form
    667,749.66/921,813.64 = 381,214.32/x
  3. Step 3: Cross multiply
    667,749.66x = 921,813.64 × 381,214.32
  4. Step 4: Simplify right side
    667,749.66x = 351,408,559,939.33
  5. Step 5: Solve for x
    x = 351,408,559,939.33/667,749.66
  6. Step 6: Final answer
    x = 526,257.94

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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.