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Finding the Fourth Proportional to 470,219.28, 648,915.44 and 276,640.60

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Solution

The fourth proportional to 470,219.28, 648,915.44 and 276,640.60 is: 381,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,219.28 : 648,915.44 = 276,640.60 : x
  2. Step 2: Convert to fraction form
    470,219.28/648,915.44 = 276,640.60/x
  3. Step 3: Cross multiply
    470,219.28x = 648,915.44 × 276,640.60
  4. Step 4: Simplify right side
    470,219.28x = 179,516,356,670.86
  5. Step 5: Solve for x
    x = 179,516,356,670.86/470,219.28
  6. Step 6: Final answer
    x = 381,771.58

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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.