Home / 1,117.11-1,675.62-386.67

Finding the Fourth Proportional to 1,117.11, 1,675.62 and 386.67

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Solution

The fourth proportional to 1,117.11, 1,675.62 and 386.67 is: 579.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.11 : 1,675.62 = 386.67 : x
  2. Step 2: Convert to fraction form
    1,117.11/1,675.62 = 386.67/x
  3. Step 3: Cross multiply
    1,117.11x = 1,675.62 × 386.67
  4. Step 4: Simplify right side
    1,117.11x = 647,911.99
  5. Step 5: Solve for x
    x = 647,911.99/1,117.11
  6. Step 6: Final answer
    x = 579.99

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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.