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Finding the Fourth Proportional to 278,665.60, 417,998.40 and 274,057.60

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Solution

The fourth proportional to 278,665.60, 417,998.40 and 274,057.60 is: 411,086.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,665.60 : 417,998.40 = 274,057.60 : x
  2. Step 2: Convert to fraction form
    278,665.60/417,998.40 = 274,057.60/x
  3. Step 3: Cross multiply
    278,665.60x = 417,998.40 × 274,057.60
  4. Step 4: Simplify right side
    278,665.60x = 114,555,638,307.84
  5. Step 5: Solve for x
    x = 114,555,638,307.84/278,665.60
  6. Step 6: Final answer
    x = 411,086.40

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1.5x scale

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.