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Finding the Fourth Proportional to 1,770.22, 2,655.30 and 990.07

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Solution

The fourth proportional to 1,770.22, 2,655.30 and 990.07 is: 1,485.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.22 : 2,655.30 = 990.07 : x
  2. Step 2: Convert to fraction form
    1,770.22/2,655.30 = 990.07/x
  3. Step 3: Cross multiply
    1,770.22x = 2,655.30 × 990.07
  4. Step 4: Simplify right side
    1,770.22x = 2,628,932.87
  5. Step 5: Solve for x
    x = 2,628,932.87/1,770.22
  6. Step 6: Final answer
    x = 1,485.09

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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.