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Finding the Fourth Proportional to 1,770.98, 2,444.02 and 985

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Solution

The fourth proportional to 1,770.98, 2,444.02 and 985 is: 1,359.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.98 : 2,444.02 = 985 : x
  2. Step 2: Convert to fraction form
    1,770.98/2,444.02 = 985/x
  3. Step 3: Cross multiply
    1,770.98x = 2,444.02 × 985
  4. Step 4: Simplify right side
    1,770.98x = 2,407,359.70
  5. Step 5: Solve for x
    x = 2,407,359.70/1,770.98
  6. Step 6: Final answer
    x = 1,359.34

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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.