Home / 1,212.72-1,675.08-1,055.04

Finding the Fourth Proportional to 1,212.72, 1,675.08 and 1,055.04

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Solution

The fourth proportional to 1,212.72, 1,675.08 and 1,055.04 is: 1,457.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.72 : 1,675.08 = 1,055.04 : x
  2. Step 2: Convert to fraction form
    1,212.72/1,675.08 = 1,055.04/x
  3. Step 3: Cross multiply
    1,212.72x = 1,675.08 × 1,055.04
  4. Step 4: Simplify right side
    1,212.72x = 1,767,276.40
  5. Step 5: Solve for x
    x = 1,767,276.40/1,212.72
  6. Step 6: Final answer
    x = 1,457.28

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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.