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Finding the Fourth Proportional to 3,100.19, 4,650.21 and 760.21

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Solution

The fourth proportional to 3,100.19, 4,650.21 and 760.21 is: 1,140.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.19 : 4,650.21 = 760.21 : x
  2. Step 2: Convert to fraction form
    3,100.19/4,650.21 = 760.21/x
  3. Step 3: Cross multiply
    3,100.19x = 4,650.21 × 760.21
  4. Step 4: Simplify right side
    3,100.19x = 3,535,124.52
  5. Step 5: Solve for x
    x = 3,535,124.52/3,100.19
  6. Step 6: Final answer
    x = 1,140.29

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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.