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Finding the Fourth Proportional to 637,690.41, 879,994.78 and 347,295.42

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Solution

The fourth proportional to 637,690.41, 879,994.78 and 347,295.42 is: 479,257.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,690.41 : 879,994.78 = 347,295.42 : x
  2. Step 2: Convert to fraction form
    637,690.41/879,994.78 = 347,295.42/x
  3. Step 3: Cross multiply
    637,690.41x = 879,994.78 × 347,295.42
  4. Step 4: Simplify right side
    637,690.41x = 305,618,156,717.91
  5. Step 5: Solve for x
    x = 305,618,156,717.91/637,690.41
  6. Step 6: Final answer
    x = 479,257.88

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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.