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Finding the Fourth Proportional to 2,910.57, 4,365.87 and 830.58

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Solution

The fourth proportional to 2,910.57, 4,365.87 and 830.58 is: 1,245.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,910.57 : 4,365.87 = 830.58 : x
  2. Step 2: Convert to fraction form
    2,910.57/4,365.87 = 830.58/x
  3. Step 3: Cross multiply
    2,910.57x = 4,365.87 × 830.58
  4. Step 4: Simplify right side
    2,910.57x = 3,626,204.30
  5. Step 5: Solve for x
    x = 3,626,204.30/2,910.57
  6. Step 6: Final answer
    x = 1,245.87

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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.