Home / 1,427.90-1,975.88-1,217.73

Finding the Fourth Proportional to 1,427.90, 1,975.88 and 1,217.73

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Solution

The fourth proportional to 1,427.90, 1,975.88 and 1,217.73 is: 1,685.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.90 : 1,975.88 = 1,217.73 : x
  2. Step 2: Convert to fraction form
    1,427.90/1,975.88 = 1,217.73/x
  3. Step 3: Cross multiply
    1,427.90x = 1,975.88 × 1,217.73
  4. Step 4: Simplify right side
    1,427.90x = 2,406,082.26
  5. Step 5: Solve for x
    x = 2,406,082.26/1,427.90
  6. Step 6: Final answer
    x = 1,685.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.