Home / 1,021.14-1,531.95-404.87

Finding the Fourth Proportional to 1,021.14, 1,531.95 and 404.87

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Solution

The fourth proportional to 1,021.14, 1,531.95 and 404.87 is: 607.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.14 : 1,531.95 = 404.87 : x
  2. Step 2: Convert to fraction form
    1,021.14/1,531.95 = 404.87/x
  3. Step 3: Cross multiply
    1,021.14x = 1,531.95 × 404.87
  4. Step 4: Simplify right side
    1,021.14x = 620,231.42
  5. Step 5: Solve for x
    x = 620,231.42/1,021.14
  6. Step 6: Final answer
    x = 607.39

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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.