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Finding the Fourth Proportional to 1,282.95, 1,770.93 and 890.37

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Solution

The fourth proportional to 1,282.95, 1,770.93 and 890.37 is: 1,229.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.95 : 1,770.93 = 890.37 : x
  2. Step 2: Convert to fraction form
    1,282.95/1,770.93 = 890.37/x
  3. Step 3: Cross multiply
    1,282.95x = 1,770.93 × 890.37
  4. Step 4: Simplify right side
    1,282.95x = 1,576,782.94
  5. Step 5: Solve for x
    x = 1,576,782.94/1,282.95
  6. Step 6: Final answer
    x = 1,229.03

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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.