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Finding the Fourth Proportional to 308,582.80, 426,012.20 and 201,218.32

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Solution

The fourth proportional to 308,582.80, 426,012.20 and 201,218.32 is: 277,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,582.80 : 426,012.20 = 201,218.32 : x
  2. Step 2: Convert to fraction form
    308,582.80/426,012.20 = 201,218.32/x
  3. Step 3: Cross multiply
    308,582.80x = 426,012.20 × 201,218.32
  4. Step 4: Simplify right side
    308,582.80x = 85,721,459,183.50
  5. Step 5: Solve for x
    x = 85,721,459,183.50/308,582.80
  6. Step 6: Final answer
    x = 277,790.79

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1.5x scale

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.