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Finding the Fourth Proportional to 1,955.90, 2,699.19 and 1,071.71

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Solution

The fourth proportional to 1,955.90, 2,699.19 and 1,071.71 is: 1,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.90 : 2,699.19 = 1,071.71 : x
  2. Step 2: Convert to fraction form
    1,955.90/2,699.19 = 1,071.71/x
  3. Step 3: Cross multiply
    1,955.90x = 2,699.19 × 1,071.71
  4. Step 4: Simplify right side
    1,955.90x = 2,892,735.42
  5. Step 5: Solve for x
    x = 2,892,735.42/1,955.90
  6. Step 6: Final answer
    x = 1,478.98

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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.