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Finding the Fourth Proportional to 1,618.20, 2,427.30 and 448.20

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Solution

The fourth proportional to 1,618.20, 2,427.30 and 448.20 is: 672.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.20 : 2,427.30 = 448.20 : x
  2. Step 2: Convert to fraction form
    1,618.20/2,427.30 = 448.20/x
  3. Step 3: Cross multiply
    1,618.20x = 2,427.30 × 448.20
  4. Step 4: Simplify right side
    1,618.20x = 1,087,915.86
  5. Step 5: Solve for x
    x = 1,087,915.86/1,618.20
  6. Step 6: Final answer
    x = 672.30

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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.