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Finding the Fourth Proportional to 3,054.70, 4,215.49 and 1,728.38

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Solution

The fourth proportional to 3,054.70, 4,215.49 and 1,728.38 is: 2,385.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,054.70 : 4,215.49 = 1,728.38 : x
  2. Step 2: Convert to fraction form
    3,054.70/4,215.49 = 1,728.38/x
  3. Step 3: Cross multiply
    3,054.70x = 4,215.49 × 1,728.38
  4. Step 4: Simplify right side
    3,054.70x = 7,285,968.61
  5. Step 5: Solve for x
    x = 7,285,968.61/3,054.70
  6. Step 6: Final answer
    x = 2,385.16

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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.