Home / 1,021.13-1,531.70-251.63

Finding the Fourth Proportional to 1,021.13, 1,531.70 and 251.63

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Solution

The fourth proportional to 1,021.13, 1,531.70 and 251.63 is: 377.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.13 : 1,531.70 = 251.63 : x
  2. Step 2: Convert to fraction form
    1,021.13/1,531.70 = 251.63/x
  3. Step 3: Cross multiply
    1,021.13x = 1,531.70 × 251.63
  4. Step 4: Simplify right side
    1,021.13x = 385,412.75
  5. Step 5: Solve for x
    x = 385,412.75/1,021.13
  6. Step 6: Final answer
    x = 377.44

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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.