Home / 1,370.30-2,055.78-445.86

Finding the Fourth Proportional to 1,370.30, 2,055.78 and 445.86

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Solution

The fourth proportional to 1,370.30, 2,055.78 and 445.86 is: 668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.30 : 2,055.78 = 445.86 : x
  2. Step 2: Convert to fraction form
    1,370.30/2,055.78 = 445.86/x
  3. Step 3: Cross multiply
    1,370.30x = 2,055.78 × 445.86
  4. Step 4: Simplify right side
    1,370.30x = 916,590.07
  5. Step 5: Solve for x
    x = 916,590.07/1,370.30
  6. Step 6: Final answer
    x = 668.90

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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.