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Finding the Fourth Proportional to 1,283.07, 1,771.65 and 955.02

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Solution

The fourth proportional to 1,283.07, 1,771.65 and 955.02 is: 1,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.07 : 1,771.65 = 955.02 : x
  2. Step 2: Convert to fraction form
    1,283.07/1,771.65 = 955.02/x
  3. Step 3: Cross multiply
    1,283.07x = 1,771.65 × 955.02
  4. Step 4: Simplify right side
    1,283.07x = 1,691,961.18
  5. Step 5: Solve for x
    x = 1,691,961.18/1,283.07
  6. Step 6: Final answer
    x = 1,318.68

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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.