Home / 1,210.16-1,668.25-855.45

Finding the Fourth Proportional to 1,210.16, 1,668.25 and 855.45

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Solution

The fourth proportional to 1,210.16, 1,668.25 and 855.45 is: 1,179.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.16 : 1,668.25 = 855.45 : x
  2. Step 2: Convert to fraction form
    1,210.16/1,668.25 = 855.45/x
  3. Step 3: Cross multiply
    1,210.16x = 1,668.25 × 855.45
  4. Step 4: Simplify right side
    1,210.16x = 1,427,100.19
  5. Step 5: Solve for x
    x = 1,427,100.19/1,210.16
  6. Step 6: Final answer
    x = 1,179.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.