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Finding the Fourth Proportional to 3,190.43, 4,785.65 and 999.18

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Solution

The fourth proportional to 3,190.43, 4,785.65 and 999.18 is: 1,498.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.43 : 4,785.65 = 999.18 : x
  2. Step 2: Convert to fraction form
    3,190.43/4,785.65 = 999.18/x
  3. Step 3: Cross multiply
    3,190.43x = 4,785.65 × 999.18
  4. Step 4: Simplify right side
    3,190.43x = 4,781,720.77
  5. Step 5: Solve for x
    x = 4,781,720.77/3,190.43
  6. Step 6: Final answer
    x = 1,498.77

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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.