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Finding the Fourth Proportional to 4,453.93, 6,678.85 and 1,290.65

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Solution

The fourth proportional to 4,453.93, 6,678.85 and 1,290.65 is: 1,935.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,453.93 : 6,678.85 = 1,290.65 : x
  2. Step 2: Convert to fraction form
    4,453.93/6,678.85 = 1,290.65/x
  3. Step 3: Cross multiply
    4,453.93x = 6,678.85 × 1,290.65
  4. Step 4: Simplify right side
    4,453.93x = 8,620,057.75
  5. Step 5: Solve for x
    x = 8,620,057.75/4,453.93
  6. Step 6: Final answer
    x = 1,935.38

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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.