Home / 1,215.30-1,822.98-445.26

Finding the Fourth Proportional to 1,215.30, 1,822.98 and 445.26

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Solution

The fourth proportional to 1,215.30, 1,822.98 and 445.26 is: 667.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.30 : 1,822.98 = 445.26 : x
  2. Step 2: Convert to fraction form
    1,215.30/1,822.98 = 445.26/x
  3. Step 3: Cross multiply
    1,215.30x = 1,822.98 × 445.26
  4. Step 4: Simplify right side
    1,215.30x = 811,700.07
  5. Step 5: Solve for x
    x = 811,700.07/1,215.30
  6. Step 6: Final answer
    x = 667.90

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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.