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Finding the Fourth Proportional to 3,011, 4,155.30 and 1,684.88

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Solution

The fourth proportional to 3,011, 4,155.30 and 1,684.88 is: 2,325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,011 : 4,155.30 = 1,684.88 : x
  2. Step 2: Convert to fraction form
    3,011/4,155.30 = 1,684.88/x
  3. Step 3: Cross multiply
    3,011x = 4,155.30 × 1,684.88
  4. Step 4: Simplify right side
    3,011x = 7,001,181.86
  5. Step 5: Solve for x
    x = 7,001,181.86/3,011
  6. Step 6: Final answer
    x = 2,325.20

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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.