Home / 1,210.95-1,815.35-480.33

Finding the Fourth Proportional to 1,210.95, 1,815.35 and 480.33

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Solution

The fourth proportional to 1,210.95, 1,815.35 and 480.33 is: 720.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.95 : 1,815.35 = 480.33 : x
  2. Step 2: Convert to fraction form
    1,210.95/1,815.35 = 480.33/x
  3. Step 3: Cross multiply
    1,210.95x = 1,815.35 × 480.33
  4. Step 4: Simplify right side
    1,210.95x = 871,964.66
  5. Step 5: Solve for x
    x = 871,964.66/1,210.95
  6. Step 6: Final answer
    x = 720.07

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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.