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Finding the Fourth Proportional to 284,428.80, 426,254.40 and 189,388.80

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Solution

The fourth proportional to 284,428.80, 426,254.40 and 189,388.80 is: 283,824.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,428.80 : 426,254.40 = 189,388.80 : x
  2. Step 2: Convert to fraction form
    284,428.80/426,254.40 = 189,388.80/x
  3. Step 3: Cross multiply
    284,428.80x = 426,254.40 × 189,388.80
  4. Step 4: Simplify right side
    284,428.80x = 80,727,809,310.72
  5. Step 5: Solve for x
    x = 80,727,809,310.72/284,428.80
  6. Step 6: Final answer
    x = 283,824.31

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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.