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Finding the Fourth Proportional to 298,710.09, 411,943.01 and 218,009.79

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Solution

The fourth proportional to 298,710.09, 411,943.01 and 218,009.79 is: 300,651.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,710.09 : 411,943.01 = 218,009.79 : x
  2. Step 2: Convert to fraction form
    298,710.09/411,943.01 = 218,009.79/x
  3. Step 3: Cross multiply
    298,710.09x = 411,943.01 × 218,009.79
  4. Step 4: Simplify right side
    298,710.09x = 89,807,608,012.02
  5. Step 5: Solve for x
    x = 89,807,608,012.02/298,710.09
  6. Step 6: Final answer
    x = 300,651.40

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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.