Home / 1,138.10-1,707.14-316.37

Finding the Fourth Proportional to 1,138.10, 1,707.14 and 316.37

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Solution

The fourth proportional to 1,138.10, 1,707.14 and 316.37 is: 474.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.10 : 1,707.14 = 316.37 : x
  2. Step 2: Convert to fraction form
    1,138.10/1,707.14 = 316.37/x
  3. Step 3: Cross multiply
    1,138.10x = 1,707.14 × 316.37
  4. Step 4: Simplify right side
    1,138.10x = 540,087.88
  5. Step 5: Solve for x
    x = 540,087.88/1,138.10
  6. Step 6: Final answer
    x = 474.55

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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.