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Finding the Fourth Proportional to 399,382.77, 551,127.69 and 218,059.77

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Solution

The fourth proportional to 399,382.77, 551,127.69 and 218,059.77 is: 300,911.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,382.77 : 551,127.69 = 218,059.77 : x
  2. Step 2: Convert to fraction form
    399,382.77/551,127.69 = 218,059.77/x
  3. Step 3: Cross multiply
    399,382.77x = 551,127.69 × 218,059.77
  4. Step 4: Simplify right side
    399,382.77x = 120,178,777,322.03
  5. Step 5: Solve for x
    x = 120,178,777,322.03/399,382.77
  6. Step 6: Final answer
    x = 300,911.27

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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.