Home / 1,225.05-1,837.80-403.55

Finding the Fourth Proportional to 1,225.05, 1,837.80 and 403.55

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Solution

The fourth proportional to 1,225.05, 1,837.80 and 403.55 is: 605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.05 : 1,837.80 = 403.55 : x
  2. Step 2: Convert to fraction form
    1,225.05/1,837.80 = 403.55/x
  3. Step 3: Cross multiply
    1,225.05x = 1,837.80 × 403.55
  4. Step 4: Simplify right side
    1,225.05x = 741,642.17
  5. Step 5: Solve for x
    x = 741,642.17/1,225.05
  6. Step 6: Final answer
    x = 605.40

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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.