Home / 1,515.81-2,091.91-948.55

Finding the Fourth Proportional to 1,515.81, 2,091.91 and 948.55

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Solution

The fourth proportional to 1,515.81, 2,091.91 and 948.55 is: 1,309.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.81 : 2,091.91 = 948.55 : x
  2. Step 2: Convert to fraction form
    1,515.81/2,091.91 = 948.55/x
  3. Step 3: Cross multiply
    1,515.81x = 2,091.91 × 948.55
  4. Step 4: Simplify right side
    1,515.81x = 1,984,278.86
  5. Step 5: Solve for x
    x = 1,984,278.86/1,515.81
  6. Step 6: Final answer
    x = 1,309.06

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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.