Home / 1,210.85-1,815.23-480.02

Finding the Fourth Proportional to 1,210.85, 1,815.23 and 480.02

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Solution

The fourth proportional to 1,210.85, 1,815.23 and 480.02 is: 719.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.85 : 1,815.23 = 480.02 : x
  2. Step 2: Convert to fraction form
    1,210.85/1,815.23 = 480.02/x
  3. Step 3: Cross multiply
    1,210.85x = 1,815.23 × 480.02
  4. Step 4: Simplify right side
    1,210.85x = 871,335.23
  5. Step 5: Solve for x
    x = 871,335.23/1,210.85
  6. Step 6: Final answer
    x = 719.61

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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.