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Finding the Fourth Proportional to 494,730.61, 740,974.60 and 387,445.84

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Solution

The fourth proportional to 494,730.61, 740,974.60 and 387,445.84 is: 580,290.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,730.61 : 740,974.60 = 387,445.84 : x
  2. Step 2: Convert to fraction form
    494,730.61/740,974.60 = 387,445.84/x
  3. Step 3: Cross multiply
    494,730.61x = 740,974.60 × 387,445.84
  4. Step 4: Simplify right side
    494,730.61x = 287,087,526,315.66
  5. Step 5: Solve for x
    x = 287,087,526,315.66/494,730.61
  6. Step 6: Final answer
    x = 580,290.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.