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Finding the Fourth Proportional to 1,171.42, 1,755.84 and 848.20

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Solution

The fourth proportional to 1,171.42, 1,755.84 and 848.20 is: 1,271.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.42 : 1,755.84 = 848.20 : x
  2. Step 2: Convert to fraction form
    1,171.42/1,755.84 = 848.20/x
  3. Step 3: Cross multiply
    1,171.42x = 1,755.84 × 848.20
  4. Step 4: Simplify right side
    1,171.42x = 1,489,303.49
  5. Step 5: Solve for x
    x = 1,489,303.49/1,171.42
  6. Step 6: Final answer
    x = 1,271.37

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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.