Home / 1,043.12-1,563.40-393.36

Finding the Fourth Proportional to 1,043.12, 1,563.40 and 393.36

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Solution

The fourth proportional to 1,043.12, 1,563.40 and 393.36 is: 589.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.12 : 1,563.40 = 393.36 : x
  2. Step 2: Convert to fraction form
    1,043.12/1,563.40 = 393.36/x
  3. Step 3: Cross multiply
    1,043.12x = 1,563.40 × 393.36
  4. Step 4: Simplify right side
    1,043.12x = 614,979.02
  5. Step 5: Solve for x
    x = 614,979.02/1,043.12
  6. Step 6: Final answer
    x = 589.56

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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.