Home / 1,346.09-2,019.40-421.79

Finding the Fourth Proportional to 1,346.09, 2,019.40 and 421.79

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Solution

The fourth proportional to 1,346.09, 2,019.40 and 421.79 is: 632.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.09 : 2,019.40 = 421.79 : x
  2. Step 2: Convert to fraction form
    1,346.09/2,019.40 = 421.79/x
  3. Step 3: Cross multiply
    1,346.09x = 2,019.40 × 421.79
  4. Step 4: Simplify right side
    1,346.09x = 851,751.57
  5. Step 5: Solve for x
    x = 851,751.57/1,346.09
  6. Step 6: Final answer
    x = 632.76

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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.