Home / 1,055.11-1,581.54-405.67

Finding the Fourth Proportional to 1,055.11, 1,581.54 and 405.67

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Solution

The fourth proportional to 1,055.11, 1,581.54 and 405.67 is: 608.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.11 : 1,581.54 = 405.67 : x
  2. Step 2: Convert to fraction form
    1,055.11/1,581.54 = 405.67/x
  3. Step 3: Cross multiply
    1,055.11x = 1,581.54 × 405.67
  4. Step 4: Simplify right side
    1,055.11x = 641,583.33
  5. Step 5: Solve for x
    x = 641,583.33/1,055.11
  6. Step 6: Final answer
    x = 608.07

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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.