Home / 1,181.10-1,771.68-315.36

Finding the Fourth Proportional to 1,181.10, 1,771.68 and 315.36

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Solution

The fourth proportional to 1,181.10, 1,771.68 and 315.36 is: 473.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.10 : 1,771.68 = 315.36 : x
  2. Step 2: Convert to fraction form
    1,181.10/1,771.68 = 315.36/x
  3. Step 3: Cross multiply
    1,181.10x = 1,771.68 × 315.36
  4. Step 4: Simplify right side
    1,181.10x = 558,717.00
  5. Step 5: Solve for x
    x = 558,717.00/1,181.10
  6. Step 6: Final answer
    x = 473.05

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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.