Home / 1,181.23-1,771.89-315.55

Finding the Fourth Proportional to 1,181.23, 1,771.89 and 315.55

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Solution

The fourth proportional to 1,181.23, 1,771.89 and 315.55 is: 473.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.23 : 1,771.89 = 315.55 : x
  2. Step 2: Convert to fraction form
    1,181.23/1,771.89 = 315.55/x
  3. Step 3: Cross multiply
    1,181.23x = 1,771.89 × 315.55
  4. Step 4: Simplify right side
    1,181.23x = 559,119.89
  5. Step 5: Solve for x
    x = 559,119.89/1,181.23
  6. Step 6: Final answer
    x = 473.34

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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.