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Finding the Fourth Proportional to 3,590.28, 5,385.36 and 993.18

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Solution

The fourth proportional to 3,590.28, 5,385.36 and 993.18 is: 1,489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,590.28 : 5,385.36 = 993.18 : x
  2. Step 2: Convert to fraction form
    3,590.28/5,385.36 = 993.18/x
  3. Step 3: Cross multiply
    3,590.28x = 5,385.36 × 993.18
  4. Step 4: Simplify right side
    3,590.28x = 5,348,631.84
  5. Step 5: Solve for x
    x = 5,348,631.84/3,590.28
  6. Step 6: Final answer
    x = 1,489.75

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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.