Home / 3,815.40-5,723.28-1,218.12

Finding the Fourth Proportional to 3,815.40, 5,723.28 and 1,218.12

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Solution

The fourth proportional to 3,815.40, 5,723.28 and 1,218.12 is: 1,827.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.40 : 5,723.28 = 1,218.12 : x
  2. Step 2: Convert to fraction form
    3,815.40/5,723.28 = 1,218.12/x
  3. Step 3: Cross multiply
    3,815.40x = 5,723.28 × 1,218.12
  4. Step 4: Simplify right side
    3,815.40x = 6,971,641.83
  5. Step 5: Solve for x
    x = 6,971,641.83/3,815.40
  6. Step 6: Final answer
    x = 1,827.24

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1.5x scale

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.