Home / 1,214.40-1,822.56-445.12

Finding the Fourth Proportional to 1,214.40, 1,822.56 and 445.12

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Solution

The fourth proportional to 1,214.40, 1,822.56 and 445.12 is: 668.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.40 : 1,822.56 = 445.12 : x
  2. Step 2: Convert to fraction form
    1,214.40/1,822.56 = 445.12/x
  3. Step 3: Cross multiply
    1,214.40x = 1,822.56 × 445.12
  4. Step 4: Simplify right side
    1,214.40x = 811,257.91
  5. Step 5: Solve for x
    x = 811,257.91/1,214.40
  6. Step 6: Final answer
    x = 668.03

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1.5x scale

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.