Home / 1,293.24-1,939.80-427.50

Finding the Fourth Proportional to 1,293.24, 1,939.80 and 427.50

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Solution

The fourth proportional to 1,293.24, 1,939.80 and 427.50 is: 641.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.24 : 1,939.80 = 427.50 : x
  2. Step 2: Convert to fraction form
    1,293.24/1,939.80 = 427.50/x
  3. Step 3: Cross multiply
    1,293.24x = 1,939.80 × 427.50
  4. Step 4: Simplify right side
    1,293.24x = 829,264.50
  5. Step 5: Solve for x
    x = 829,264.50/1,293.24
  6. Step 6: Final answer
    x = 641.23

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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.