Home / 1,353.42-2,020.32-1,189.40

Finding the Fourth Proportional to 1,353.42, 2,020.32 and 1,189.40

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Solution

The fourth proportional to 1,353.42, 2,020.32 and 1,189.40 is: 1,775.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.42 : 2,020.32 = 1,189.40 : x
  2. Step 2: Convert to fraction form
    1,353.42/2,020.32 = 1,189.40/x
  3. Step 3: Cross multiply
    1,353.42x = 2,020.32 × 1,189.40
  4. Step 4: Simplify right side
    1,353.42x = 2,402,958.51
  5. Step 5: Solve for x
    x = 2,402,958.51/1,353.42
  6. Step 6: Final answer
    x = 1,775.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.