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Finding the Fourth Proportional to 1,353.63, 1,867.13 and 829.69

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Solution

The fourth proportional to 1,353.63, 1,867.13 and 829.69 is: 1,144.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.63 : 1,867.13 = 829.69 : x
  2. Step 2: Convert to fraction form
    1,353.63/1,867.13 = 829.69/x
  3. Step 3: Cross multiply
    1,353.63x = 1,867.13 × 829.69
  4. Step 4: Simplify right side
    1,353.63x = 1,549,134.94
  5. Step 5: Solve for x
    x = 1,549,134.94/1,353.63
  6. Step 6: Final answer
    x = 1,144.43

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Half scale
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Double scale
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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.