Home / 1,231.10-1,845.30-711.35

Finding the Fourth Proportional to 1,231.10, 1,845.30 and 711.35

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Solution

The fourth proportional to 1,231.10, 1,845.30 and 711.35 is: 1,066.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.10 : 1,845.30 = 711.35 : x
  2. Step 2: Convert to fraction form
    1,231.10/1,845.30 = 711.35/x
  3. Step 3: Cross multiply
    1,231.10x = 1,845.30 × 711.35
  4. Step 4: Simplify right side
    1,231.10x = 1,312,654.16
  5. Step 5: Solve for x
    x = 1,312,654.16/1,231.10
  6. Step 6: Final answer
    x = 1,066.24

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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.