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Finding the Fourth Proportional to 667,690.94, 921,479.47 and 381,254.10

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Solution

The fourth proportional to 667,690.94, 921,479.47 and 381,254.10 is: 526,168.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,690.94 : 921,479.47 = 381,254.10 : x
  2. Step 2: Convert to fraction form
    667,690.94/921,479.47 = 381,254.10/x
  3. Step 3: Cross multiply
    667,690.94x = 921,479.47 × 381,254.10
  4. Step 4: Simplify right side
    667,690.94x = 351,317,826,003.33
  5. Step 5: Solve for x
    x = 351,317,826,003.33/667,690.94
  6. Step 6: Final answer
    x = 526,168.33

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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.