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Finding the Fourth Proportional to 1,531.51, 2,113.49 and 868.37

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Solution

The fourth proportional to 1,531.51, 2,113.49 and 868.37 is: 1,198.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.51 : 2,113.49 = 868.37 : x
  2. Step 2: Convert to fraction form
    1,531.51/2,113.49 = 868.37/x
  3. Step 3: Cross multiply
    1,531.51x = 2,113.49 × 868.37
  4. Step 4: Simplify right side
    1,531.51x = 1,835,276.40
  5. Step 5: Solve for x
    x = 1,835,276.40/1,531.51
  6. Step 6: Final answer
    x = 1,198.34

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1.5x scale

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.