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Finding the Fourth Proportional to 1,955.40, 2,933.77 and 860.55

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Solution

The fourth proportional to 1,955.40, 2,933.77 and 860.55 is: 1,291.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.40 : 2,933.77 = 860.55 : x
  2. Step 2: Convert to fraction form
    1,955.40/2,933.77 = 860.55/x
  3. Step 3: Cross multiply
    1,955.40x = 2,933.77 × 860.55
  4. Step 4: Simplify right side
    1,955.40x = 2,524,655.77
  5. Step 5: Solve for x
    x = 2,524,655.77/1,955.40
  6. Step 6: Final answer
    x = 1,291.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.