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Finding the Fourth Proportional to 1,141.82, 1,712.74 and 899.64

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Solution

The fourth proportional to 1,141.82, 1,712.74 and 899.64 is: 1,349.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.82 : 1,712.74 = 899.64 : x
  2. Step 2: Convert to fraction form
    1,141.82/1,712.74 = 899.64/x
  3. Step 3: Cross multiply
    1,141.82x = 1,712.74 × 899.64
  4. Step 4: Simplify right side
    1,141.82x = 1,540,849.41
  5. Step 5: Solve for x
    x = 1,540,849.41/1,141.82
  6. Step 6: Final answer
    x = 1,349.47

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Half scale
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Double scale
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Similar ratio
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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.