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Finding the Fourth Proportional to 3,190.42, 4,785.69 and 999.10

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Solution

The fourth proportional to 3,190.42, 4,785.69 and 999.10 is: 1,498.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.42 : 4,785.69 = 999.10 : x
  2. Step 2: Convert to fraction form
    3,190.42/4,785.69 = 999.10/x
  3. Step 3: Cross multiply
    3,190.42x = 4,785.69 × 999.10
  4. Step 4: Simplify right side
    3,190.42x = 4,781,358.95
  5. Step 5: Solve for x
    x = 4,781,358.95/3,190.42
  6. Step 6: Final answer
    x = 1,498.66

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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.