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Finding the Fourth Proportional to 420,515.20, 630,918.60 and 184,027.60

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Solution

The fourth proportional to 420,515.20, 630,918.60 and 184,027.60 is: 276,105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,515.20 : 630,918.60 = 184,027.60 : x
  2. Step 2: Convert to fraction form
    420,515.20/630,918.60 = 184,027.60/x
  3. Step 3: Cross multiply
    420,515.20x = 630,918.60 × 184,027.60
  4. Step 4: Simplify right side
    420,515.20x = 116,106,435,753.36
  5. Step 5: Solve for x
    x = 116,106,435,753.36/420,515.20
  6. Step 6: Final answer
    x = 276,105.21

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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.