Home / 1,330.13-1,995.20-919.15

Finding the Fourth Proportional to 1,330.13, 1,995.20 and 919.15

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Solution

The fourth proportional to 1,330.13, 1,995.20 and 919.15 is: 1,378.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.13 : 1,995.20 = 919.15 : x
  2. Step 2: Convert to fraction form
    1,330.13/1,995.20 = 919.15/x
  3. Step 3: Cross multiply
    1,330.13x = 1,995.20 × 919.15
  4. Step 4: Simplify right side
    1,330.13x = 1,833,888.08
  5. Step 5: Solve for x
    x = 1,833,888.08/1,330.13
  6. Step 6: Final answer
    x = 1,378.73

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Similar ratio
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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.