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Finding the Fourth Proportional to 993.34, 1,490.12 and 262.97

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Solution

The fourth proportional to 993.34, 1,490.12 and 262.97 is: 394.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.34 : 1,490.12 = 262.97 : x
  2. Step 2: Convert to fraction form
    993.34/1,490.12 = 262.97/x
  3. Step 3: Cross multiply
    993.34x = 1,490.12 × 262.97
  4. Step 4: Simplify right side
    993.34x = 391,859.60
  5. Step 5: Solve for x
    x = 391,859.60/993.34
  6. Step 6: Final answer
    x = 394.49

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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.