Home / 1,515.20-2,091.06-955.46

Finding the Fourth Proportional to 1,515.20, 2,091.06 and 955.46

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Solution

The fourth proportional to 1,515.20, 2,091.06 and 955.46 is: 1,318.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.20 : 2,091.06 = 955.46 : x
  2. Step 2: Convert to fraction form
    1,515.20/2,091.06 = 955.46/x
  3. Step 3: Cross multiply
    1,515.20x = 2,091.06 × 955.46
  4. Step 4: Simplify right side
    1,515.20x = 1,997,924.19
  5. Step 5: Solve for x
    x = 1,997,924.19/1,515.20
  6. Step 6: Final answer
    x = 1,318.59

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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.