Home / 1,515.14-2,271.78-693.66

Finding the Fourth Proportional to 1,515.14, 2,271.78 and 693.66

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Solution

The fourth proportional to 1,515.14, 2,271.78 and 693.66 is: 1,040.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.14 : 2,271.78 = 693.66 : x
  2. Step 2: Convert to fraction form
    1,515.14/2,271.78 = 693.66/x
  3. Step 3: Cross multiply
    1,515.14x = 2,271.78 × 693.66
  4. Step 4: Simplify right side
    1,515.14x = 1,575,851.43
  5. Step 5: Solve for x
    x = 1,575,851.43/1,515.14
  6. Step 6: Final answer
    x = 1,040.07

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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.