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Finding the Fourth Proportional to 326,920.80, 490,381.20 and 116,565.60

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Solution

The fourth proportional to 326,920.80, 490,381.20 and 116,565.60 is: 174,848.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,920.80 : 490,381.20 = 116,565.60 : x
  2. Step 2: Convert to fraction form
    326,920.80/490,381.20 = 116,565.60/x
  3. Step 3: Cross multiply
    326,920.80x = 490,381.20 × 116,565.60
  4. Step 4: Simplify right side
    326,920.80x = 57,161,578,806.72
  5. Step 5: Solve for x
    x = 57,161,578,806.72/326,920.80
  6. Step 6: Final answer
    x = 174,848.40

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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.