Home / 1,222.17-1,686.87-1,025.34

Finding the Fourth Proportional to 1,222.17, 1,686.87 and 1,025.34

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Solution

The fourth proportional to 1,222.17, 1,686.87 and 1,025.34 is: 1,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.17 : 1,686.87 = 1,025.34 : x
  2. Step 2: Convert to fraction form
    1,222.17/1,686.87 = 1,025.34/x
  3. Step 3: Cross multiply
    1,222.17x = 1,686.87 × 1,025.34
  4. Step 4: Simplify right side
    1,222.17x = 1,729,615.29
  5. Step 5: Solve for x
    x = 1,729,615.29/1,222.17
  6. Step 6: Final answer
    x = 1,415.20

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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.