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Finding the Fourth Proportional to 993.39, 1,489.96 and 263.02

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Solution

The fourth proportional to 993.39, 1,489.96 and 263.02 is: 394.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.39 : 1,489.96 = 263.02 : x
  2. Step 2: Convert to fraction form
    993.39/1,489.96 = 263.02/x
  3. Step 3: Cross multiply
    993.39x = 1,489.96 × 263.02
  4. Step 4: Simplify right side
    993.39x = 391,887.96
  5. Step 5: Solve for x
    x = 391,887.96/993.39
  6. Step 6: Final answer
    x = 394.50

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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.