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Finding the Fourth Proportional to 3,005.16, 4,147.16 and 1,678.92

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Solution

The fourth proportional to 3,005.16, 4,147.16 and 1,678.92 is: 2,316.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.16 : 4,147.16 = 1,678.92 : x
  2. Step 2: Convert to fraction form
    3,005.16/4,147.16 = 1,678.92/x
  3. Step 3: Cross multiply
    3,005.16x = 4,147.16 × 1,678.92
  4. Step 4: Simplify right side
    3,005.16x = 6,962,749.87
  5. Step 5: Solve for x
    x = 6,962,749.87/3,005.16
  6. Step 6: Final answer
    x = 2,316.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.