Home / 1,317.34-1,975.53-495.40

Finding the Fourth Proportional to 1,317.34, 1,975.53 and 495.40

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Solution

The fourth proportional to 1,317.34, 1,975.53 and 495.40 is: 742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.34 : 1,975.53 = 495.40 : x
  2. Step 2: Convert to fraction form
    1,317.34/1,975.53 = 495.40/x
  3. Step 3: Cross multiply
    1,317.34x = 1,975.53 × 495.40
  4. Step 4: Simplify right side
    1,317.34x = 978,667.68
  5. Step 5: Solve for x
    x = 978,667.68/1,317.34
  6. Step 6: Final answer
    x = 742.91

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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.