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Finding the Fourth Proportional to 307,816.80, 461,725.20 and 274,639.20

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Solution

The fourth proportional to 307,816.80, 461,725.20 and 274,639.20 is: 411,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,816.80 : 461,725.20 = 274,639.20 : x
  2. Step 2: Convert to fraction form
    307,816.80/461,725.20 = 274,639.20/x
  3. Step 3: Cross multiply
    307,816.80x = 461,725.20 × 274,639.20
  4. Step 4: Simplify right side
    307,816.80x = 126,807,839,547.84
  5. Step 5: Solve for x
    x = 126,807,839,547.84/307,816.80
  6. Step 6: Final answer
    x = 411,958.80

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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.