Home / 1,555.45-2,333.18-401.20

Finding the Fourth Proportional to 1,555.45, 2,333.18 and 401.20

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Solution

The fourth proportional to 1,555.45, 2,333.18 and 401.20 is: 601.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.45 : 2,333.18 = 401.20 : x
  2. Step 2: Convert to fraction form
    1,555.45/2,333.18 = 401.20/x
  3. Step 3: Cross multiply
    1,555.45x = 2,333.18 × 401.20
  4. Step 4: Simplify right side
    1,555.45x = 936,078.98
  5. Step 5: Solve for x
    x = 936,078.98/1,555.45
  6. Step 6: Final answer
    x = 601.80

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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.