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Finding the Fourth Proportional to 326,780.28, 490,170.36 and 105,164.28

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Solution

The fourth proportional to 326,780.28, 490,170.36 and 105,164.28 is: 157,746.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,780.28 : 490,170.36 = 105,164.28 : x
  2. Step 2: Convert to fraction form
    326,780.28/490,170.36 = 105,164.28/x
  3. Step 3: Cross multiply
    326,780.28x = 490,170.36 × 105,164.28
  4. Step 4: Simplify right side
    326,780.28x = 51,548,412,986.74
  5. Step 5: Solve for x
    x = 51,548,412,986.74/326,780.28
  6. Step 6: Final answer
    x = 157,746.40

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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.