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Finding the Fourth Proportional to 1,235.25, 1,846.06 and 990.63

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Solution

The fourth proportional to 1,235.25, 1,846.06 and 990.63 is: 1,480.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.25 : 1,846.06 = 990.63 : x
  2. Step 2: Convert to fraction form
    1,235.25/1,846.06 = 990.63/x
  3. Step 3: Cross multiply
    1,235.25x = 1,846.06 × 990.63
  4. Step 4: Simplify right side
    1,235.25x = 1,828,759.94
  5. Step 5: Solve for x
    x = 1,828,759.94/1,235.25
  6. Step 6: Final answer
    x = 1,480.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.