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Finding the Fourth Proportional to 1,165.88, 1,611.22 and 955.72

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Solution

The fourth proportional to 1,165.88, 1,611.22 and 955.72 is: 1,320.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.88 : 1,611.22 = 955.72 : x
  2. Step 2: Convert to fraction form
    1,165.88/1,611.22 = 955.72/x
  3. Step 3: Cross multiply
    1,165.88x = 1,611.22 × 955.72
  4. Step 4: Simplify right side
    1,165.88x = 1,539,875.18
  5. Step 5: Solve for x
    x = 1,539,875.18/1,165.88
  6. Step 6: Final answer
    x = 1,320.78

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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.