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Finding the Fourth Proportional to 1,316.64, 1,975.49 and 495.14

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Solution

The fourth proportional to 1,316.64, 1,975.49 and 495.14 is: 742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.64 : 1,975.49 = 495.14 : x
  2. Step 2: Convert to fraction form
    1,316.64/1,975.49 = 495.14/x
  3. Step 3: Cross multiply
    1,316.64x = 1,975.49 × 495.14
  4. Step 4: Simplify right side
    1,316.64x = 978,131.77
  5. Step 5: Solve for x
    x = 978,131.77/1,316.64
  6. Step 6: Final answer
    x = 742.90

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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.