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Finding the Fourth Proportional to 3,155.66, 4,729.89 and 1,920.34

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Solution

The fourth proportional to 3,155.66, 4,729.89 and 1,920.34 is: 2,878.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,155.66 : 4,729.89 = 1,920.34 : x
  2. Step 2: Convert to fraction form
    3,155.66/4,729.89 = 1,920.34/x
  3. Step 3: Cross multiply
    3,155.66x = 4,729.89 × 1,920.34
  4. Step 4: Simplify right side
    3,155.66x = 9,082,996.96
  5. Step 5: Solve for x
    x = 9,082,996.96/3,155.66
  6. Step 6: Final answer
    x = 2,878.32

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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.