Home / 1,316.02-1,975.25-667.21

Finding the Fourth Proportional to 1,316.02, 1,975.25 and 667.21

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Solution

The fourth proportional to 1,316.02, 1,975.25 and 667.21 is: 1,001.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.02 : 1,975.25 = 667.21 : x
  2. Step 2: Convert to fraction form
    1,316.02/1,975.25 = 667.21/x
  3. Step 3: Cross multiply
    1,316.02x = 1,975.25 × 667.21
  4. Step 4: Simplify right side
    1,316.02x = 1,317,906.55
  5. Step 5: Solve for x
    x = 1,317,906.55/1,316.02
  6. Step 6: Final answer
    x = 1,001.43

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1.5x scale

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.