Home / 1,393.28-2,086.68-1,084.40

Finding the Fourth Proportional to 1,393.28, 2,086.68 and 1,084.40

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Solution

The fourth proportional to 1,393.28, 2,086.68 and 1,084.40 is: 1,624.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.28 : 2,086.68 = 1,084.40 : x
  2. Step 2: Convert to fraction form
    1,393.28/2,086.68 = 1,084.40/x
  3. Step 3: Cross multiply
    1,393.28x = 2,086.68 × 1,084.40
  4. Step 4: Simplify right side
    1,393.28x = 2,262,795.79
  5. Step 5: Solve for x
    x = 2,262,795.79/1,393.28
  6. Step 6: Final answer
    x = 1,624.08

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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.