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Finding the Fourth Proportional to 1,353.37, 1,867.80 and 829.09

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Solution

The fourth proportional to 1,353.37, 1,867.80 and 829.09 is: 1,144.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.37 : 1,867.80 = 829.09 : x
  2. Step 2: Convert to fraction form
    1,353.37/1,867.80 = 829.09/x
  3. Step 3: Cross multiply
    1,353.37x = 1,867.80 × 829.09
  4. Step 4: Simplify right side
    1,353.37x = 1,548,574.30
  5. Step 5: Solve for x
    x = 1,548,574.30/1,353.37
  6. Step 6: Final answer
    x = 1,144.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.