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Finding the Fourth Proportional to 1,515.55, 2,091.56 and 852.45

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Solution

The fourth proportional to 1,515.55, 2,091.56 and 852.45 is: 1,176.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.55 : 2,091.56 = 852.45 : x
  2. Step 2: Convert to fraction form
    1,515.55/2,091.56 = 852.45/x
  3. Step 3: Cross multiply
    1,515.55x = 2,091.56 × 852.45
  4. Step 4: Simplify right side
    1,515.55x = 1,782,950.32
  5. Step 5: Solve for x
    x = 1,782,950.32/1,515.55
  6. Step 6: Final answer
    x = 1,176.44

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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.