Home / 1,211.15-1,813.93-723.13

Finding the Fourth Proportional to 1,211.15, 1,813.93 and 723.13

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Solution

The fourth proportional to 1,211.15, 1,813.93 and 723.13 is: 1,083.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.15 : 1,813.93 = 723.13 : x
  2. Step 2: Convert to fraction form
    1,211.15/1,813.93 = 723.13/x
  3. Step 3: Cross multiply
    1,211.15x = 1,813.93 × 723.13
  4. Step 4: Simplify right side
    1,211.15x = 1,311,700.86
  5. Step 5: Solve for x
    x = 1,311,700.86/1,211.15
  6. Step 6: Final answer
    x = 1,083.02

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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.