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Finding the Fourth Proportional to 853.40, 1,274.36 and 848.28

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Solution

The fourth proportional to 853.40, 1,274.36 and 848.28 is: 1,266.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.40 : 1,274.36 = 848.28 : x
  2. Step 2: Convert to fraction form
    853.40/1,274.36 = 848.28/x
  3. Step 3: Cross multiply
    853.40x = 1,274.36 × 848.28
  4. Step 4: Simplify right side
    853.40x = 1,081,014.10
  5. Step 5: Solve for x
    x = 1,081,014.10/853.40
  6. Step 6: Final answer
    x = 1,266.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.