Home / 1,021.61-1,531.25-436.31

Finding the Fourth Proportional to 1,021.61, 1,531.25 and 436.31

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Solution

The fourth proportional to 1,021.61, 1,531.25 and 436.31 is: 653.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.61 : 1,531.25 = 436.31 : x
  2. Step 2: Convert to fraction form
    1,021.61/1,531.25 = 436.31/x
  3. Step 3: Cross multiply
    1,021.61x = 1,531.25 × 436.31
  4. Step 4: Simplify right side
    1,021.61x = 668,103.99
  5. Step 5: Solve for x
    x = 668,103.99/1,021.61
  6. Step 6: Final answer
    x = 653.97

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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.