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Finding the Fourth Proportional to 665,099.49, 917,883.60 and 378,619.50

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Solution

The fourth proportional to 665,099.49, 917,883.60 and 378,619.50 is: 522,521.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,099.49 : 917,883.60 = 378,619.50 : x
  2. Step 2: Convert to fraction form
    665,099.49/917,883.60 = 378,619.50/x
  3. Step 3: Cross multiply
    665,099.49x = 917,883.60 × 378,619.50
  4. Step 4: Simplify right side
    665,099.49x = 347,528,629,690.20
  5. Step 5: Solve for x
    x = 347,528,629,690.20/665,099.49
  6. Step 6: Final answer
    x = 522,521.27

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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.