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Finding the Fourth Proportional to 1,131.95, 1,697.90 and 310.22

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Solution

The fourth proportional to 1,131.95, 1,697.90 and 310.22 is: 465.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.95 : 1,697.90 = 310.22 : x
  2. Step 2: Convert to fraction form
    1,131.95/1,697.90 = 310.22/x
  3. Step 3: Cross multiply
    1,131.95x = 1,697.90 × 310.22
  4. Step 4: Simplify right side
    1,131.95x = 526,712.50
  5. Step 5: Solve for x
    x = 526,712.50/1,131.95
  6. Step 6: Final answer
    x = 465.32

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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.