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Finding the Fourth Proportional to 2,485.49, 3,728.30 and 842.13

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Solution

The fourth proportional to 2,485.49, 3,728.30 and 842.13 is: 1,263.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.49 : 3,728.30 = 842.13 : x
  2. Step 2: Convert to fraction form
    2,485.49/3,728.30 = 842.13/x
  3. Step 3: Cross multiply
    2,485.49x = 3,728.30 × 842.13
  4. Step 4: Simplify right side
    2,485.49x = 3,139,709.07
  5. Step 5: Solve for x
    x = 3,139,709.07/2,485.49
  6. Step 6: Final answer
    x = 1,263.22

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1.5x scale

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.