Home / 1,313.13-1,968.97-653.55

Finding the Fourth Proportional to 1,313.13, 1,968.97 and 653.55

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Solution

The fourth proportional to 1,313.13, 1,968.97 and 653.55 is: 979.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.13 : 1,968.97 = 653.55 : x
  2. Step 2: Convert to fraction form
    1,313.13/1,968.97 = 653.55/x
  3. Step 3: Cross multiply
    1,313.13x = 1,968.97 × 653.55
  4. Step 4: Simplify right side
    1,313.13x = 1,286,820.34
  5. Step 5: Solve for x
    x = 1,286,820.34/1,313.13
  6. Step 6: Final answer
    x = 979.96

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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.