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Finding the Fourth Proportional to 443,512.80, 664,904.70 and 190,987.20

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Solution

The fourth proportional to 443,512.80, 664,904.70 and 190,987.20 is: 286,323.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,512.80 : 664,904.70 = 190,987.20 : x
  2. Step 2: Convert to fraction form
    443,512.80/664,904.70 = 190,987.20/x
  3. Step 3: Cross multiply
    443,512.80x = 664,904.70 × 190,987.20
  4. Step 4: Simplify right side
    443,512.80x = 126,988,286,919.84
  5. Step 5: Solve for x
    x = 126,988,286,919.84/443,512.80
  6. Step 6: Final answer
    x = 286,323.84

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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.