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Finding the Fourth Proportional to 485,216.40, 669,647.88 and 270,391.44

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Solution

The fourth proportional to 485,216.40, 669,647.88 and 270,391.44 is: 373,167.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,216.40 : 669,647.88 = 270,391.44 : x
  2. Step 2: Convert to fraction form
    485,216.40/669,647.88 = 270,391.44/x
  3. Step 3: Cross multiply
    485,216.40x = 669,647.88 × 270,391.44
  4. Step 4: Simplify right side
    485,216.40x = 181,067,054,566.15
  5. Step 5: Solve for x
    x = 181,067,054,566.15/485,216.40
  6. Step 6: Final answer
    x = 373,167.63

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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.