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Finding the Fourth Proportional to 399,128.94, 550,692.74 and 227,048.49

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Solution

The fourth proportional to 399,128.94, 550,692.74 and 227,048.49 is: 313,267.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,128.94 : 550,692.74 = 227,048.49 : x
  2. Step 2: Convert to fraction form
    399,128.94/550,692.74 = 227,048.49/x
  3. Step 3: Cross multiply
    399,128.94x = 550,692.74 × 227,048.49
  4. Step 4: Simplify right side
    399,128.94x = 125,033,955,638.58
  5. Step 5: Solve for x
    x = 125,033,955,638.58/399,128.94
  6. Step 6: Final answer
    x = 313,267.08

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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.