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Finding the Fourth Proportional to 1,969.31, 2,717.34 and 1,130

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Solution

The fourth proportional to 1,969.31, 2,717.34 and 1,130 is: 1,559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.31 : 2,717.34 = 1,130 : x
  2. Step 2: Convert to fraction form
    1,969.31/2,717.34 = 1,130/x
  3. Step 3: Cross multiply
    1,969.31x = 2,717.34 × 1,130
  4. Step 4: Simplify right side
    1,969.31x = 3,070,594.20
  5. Step 5: Solve for x
    x = 3,070,594.20/1,969.31
  6. Step 6: Final answer
    x = 1,559.22

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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.