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Finding the Fourth Proportional to 308,003.80, 462,005.70 and 280,010.20

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Solution

The fourth proportional to 308,003.80, 462,005.70 and 280,010.20 is: 420,015.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,003.80 : 462,005.70 = 280,010.20 : x
  2. Step 2: Convert to fraction form
    308,003.80/462,005.70 = 280,010.20/x
  3. Step 3: Cross multiply
    308,003.80x = 462,005.70 × 280,010.20
  4. Step 4: Simplify right side
    308,003.80x = 129,366,308,458.14
  5. Step 5: Solve for x
    x = 129,366,308,458.14/308,003.80
  6. Step 6: Final answer
    x = 420,015.30

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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.