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Finding the Fourth Proportional to 3,205.70, 4,810.70 and 1,125.70

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Solution

The fourth proportional to 3,205.70, 4,810.70 and 1,125.70 is: 1,689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,205.70 : 4,810.70 = 1,125.70 : x
  2. Step 2: Convert to fraction form
    3,205.70/4,810.70 = 1,125.70/x
  3. Step 3: Cross multiply
    3,205.70x = 4,810.70 × 1,125.70
  4. Step 4: Simplify right side
    3,205.70x = 5,415,404.99
  5. Step 5: Solve for x
    x = 5,415,404.99/3,205.70
  6. Step 6: Final answer
    x = 1,689.30

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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.