Home / 1,228.07-1,839.63-609.90

Finding the Fourth Proportional to 1,228.07, 1,839.63 and 609.90

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Solution

The fourth proportional to 1,228.07, 1,839.63 and 609.90 is: 913.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.07 : 1,839.63 = 609.90 : x
  2. Step 2: Convert to fraction form
    1,228.07/1,839.63 = 609.90/x
  3. Step 3: Cross multiply
    1,228.07x = 1,839.63 × 609.90
  4. Step 4: Simplify right side
    1,228.07x = 1,121,990.34
  5. Step 5: Solve for x
    x = 1,121,990.34/1,228.07
  6. Step 6: Final answer
    x = 913.62

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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.