Home / 1,222.14-1,686.48-698.16

Finding the Fourth Proportional to 1,222.14, 1,686.48 and 698.16

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Solution

The fourth proportional to 1,222.14, 1,686.48 and 698.16 is: 963.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.14 : 1,686.48 = 698.16 : x
  2. Step 2: Convert to fraction form
    1,222.14/1,686.48 = 698.16/x
  3. Step 3: Cross multiply
    1,222.14x = 1,686.48 × 698.16
  4. Step 4: Simplify right side
    1,222.14x = 1,177,432.88
  5. Step 5: Solve for x
    x = 1,177,432.88/1,222.14
  6. Step 6: Final answer
    x = 963.42

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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.