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Finding the Fourth Proportional to 674,640.16, 1,012,893.36 and 342,449.44

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Solution

The fourth proportional to 674,640.16, 1,012,893.36 and 342,449.44 is: 514,147.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,640.16 : 1,012,893.36 = 342,449.44 : x
  2. Step 2: Convert to fraction form
    674,640.16/1,012,893.36 = 342,449.44/x
  3. Step 3: Cross multiply
    674,640.16x = 1,012,893.36 × 342,449.44
  4. Step 4: Simplify right side
    674,640.16x = 346,864,763,911.72
  5. Step 5: Solve for x
    x = 346,864,763,911.72/674,640.16
  6. Step 6: Final answer
    x = 514,147.81

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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.