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Finding the Fourth Proportional to 1,771.34, 2,444 and 985.20

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Solution

The fourth proportional to 1,771.34, 2,444 and 985.20 is: 1,359.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.34 : 2,444 = 985.20 : x
  2. Step 2: Convert to fraction form
    1,771.34/2,444 = 985.20/x
  3. Step 3: Cross multiply
    1,771.34x = 2,444 × 985.20
  4. Step 4: Simplify right side
    1,771.34x = 2,407,828.80
  5. Step 5: Solve for x
    x = 2,407,828.80/1,771.34
  6. Step 6: Final answer
    x = 1,359.33

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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.