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Finding the Fourth Proportional to 693,892.45, 957,608.13 and 421,915.30

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Solution

The fourth proportional to 693,892.45, 957,608.13 and 421,915.30 is: 582,265.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,892.45 : 957,608.13 = 421,915.30 : x
  2. Step 2: Convert to fraction form
    693,892.45/957,608.13 = 421,915.30/x
  3. Step 3: Cross multiply
    693,892.45x = 957,608.13 × 421,915.30
  4. Step 4: Simplify right side
    693,892.45x = 404,029,521,451.39
  5. Step 5: Solve for x
    x = 404,029,521,451.39/693,892.45
  6. Step 6: Final answer
    x = 582,265.34

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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.