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Finding the Fourth Proportional to 3,189.93, 4,785.75 and 998.70

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Solution

The fourth proportional to 3,189.93, 4,785.75 and 998.70 is: 1,498.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.93 : 4,785.75 = 998.70 : x
  2. Step 2: Convert to fraction form
    3,189.93/4,785.75 = 998.70/x
  3. Step 3: Cross multiply
    3,189.93x = 4,785.75 × 998.70
  4. Step 4: Simplify right side
    3,189.93x = 4,779,528.53
  5. Step 5: Solve for x
    x = 4,779,528.53/3,189.93
  6. Step 6: Final answer
    x = 1,498.32

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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.