Home / 1,365.45-2,047.90-391.29

Finding the Fourth Proportional to 1,365.45, 2,047.90 and 391.29

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Solution

The fourth proportional to 1,365.45, 2,047.90 and 391.29 is: 586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.45 : 2,047.90 = 391.29 : x
  2. Step 2: Convert to fraction form
    1,365.45/2,047.90 = 391.29/x
  3. Step 3: Cross multiply
    1,365.45x = 2,047.90 × 391.29
  4. Step 4: Simplify right side
    1,365.45x = 801,322.79
  5. Step 5: Solve for x
    x = 801,322.79/1,365.45
  6. Step 6: Final answer
    x = 586.86

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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.