Home / 1,209.02-1,813.41-387.14

Finding the Fourth Proportional to 1,209.02, 1,813.41 and 387.14

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Solution

The fourth proportional to 1,209.02, 1,813.41 and 387.14 is: 580.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.02 : 1,813.41 = 387.14 : x
  2. Step 2: Convert to fraction form
    1,209.02/1,813.41 = 387.14/x
  3. Step 3: Cross multiply
    1,209.02x = 1,813.41 × 387.14
  4. Step 4: Simplify right side
    1,209.02x = 702,043.55
  5. Step 5: Solve for x
    x = 702,043.55/1,209.02
  6. Step 6: Final answer
    x = 580.67

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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.