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Finding the Fourth Proportional to 326,780.40, 490,073.40 and 126,985.80

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Solution

The fourth proportional to 326,780.40, 490,073.40 and 126,985.80 is: 190,440.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,780.40 : 490,073.40 = 126,985.80 : x
  2. Step 2: Convert to fraction form
    326,780.40/490,073.40 = 126,985.80/x
  3. Step 3: Cross multiply
    326,780.40x = 490,073.40 × 126,985.80
  4. Step 4: Simplify right side
    326,780.40x = 62,232,362,757.72
  5. Step 5: Solve for x
    x = 62,232,362,757.72/326,780.40
  6. Step 6: Final answer
    x = 190,440.93

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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.