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Finding the Fourth Proportional to 1,308.12, 1,952.99 and 998.34

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Solution

The fourth proportional to 1,308.12, 1,952.99 and 998.34 is: 1,490.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.12 : 1,952.99 = 998.34 : x
  2. Step 2: Convert to fraction form
    1,308.12/1,952.99 = 998.34/x
  3. Step 3: Cross multiply
    1,308.12x = 1,952.99 × 998.34
  4. Step 4: Simplify right side
    1,308.12x = 1,949,743.04
  5. Step 5: Solve for x
    x = 1,949,743.04/1,308.12
  6. Step 6: Final answer
    x = 1,490.49

Related Problems

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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 (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.