Home / 1,231.13-1,847.39-653.99

Finding the Fourth Proportional to 1,231.13, 1,847.39 and 653.99

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Solution

The fourth proportional to 1,231.13, 1,847.39 and 653.99 is: 981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.13 : 1,847.39 = 653.99 : x
  2. Step 2: Convert to fraction form
    1,231.13/1,847.39 = 653.99/x
  3. Step 3: Cross multiply
    1,231.13x = 1,847.39 × 653.99
  4. Step 4: Simplify right side
    1,231.13x = 1,208,178.39
  5. Step 5: Solve for x
    x = 1,208,178.39/1,231.13
  6. Step 6: Final answer
    x = 981.36

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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.