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Finding the Fourth Proportional to 693,893.45, 957,609.51 and 421,916.30

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Solution

The fourth proportional to 693,893.45, 957,609.51 and 421,916.30 is: 582,266.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,893.45 : 957,609.51 = 421,916.30 : x
  2. Step 2: Convert to fraction form
    693,893.45/957,609.51 = 421,916.30/x
  3. Step 3: Cross multiply
    693,893.45x = 957,609.51 × 421,916.30
  4. Step 4: Simplify right side
    693,893.45x = 404,031,061,304.01
  5. Step 5: Solve for x
    x = 404,031,061,304.01/693,893.45
  6. Step 6: Final answer
    x = 582,266.72

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Double scale
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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.