Home / 1,225.16-1,837.97-445.20

Finding the Fourth Proportional to 1,225.16, 1,837.97 and 445.20

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Solution

The fourth proportional to 1,225.16, 1,837.97 and 445.20 is: 667.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.16 : 1,837.97 = 445.20 : x
  2. Step 2: Convert to fraction form
    1,225.16/1,837.97 = 445.20/x
  3. Step 3: Cross multiply
    1,225.16x = 1,837.97 × 445.20
  4. Step 4: Simplify right side
    1,225.16x = 818,259.30
  5. Step 5: Solve for x
    x = 818,259.30/1,225.16
  6. Step 6: Final answer
    x = 667.88

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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.