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Finding the Fourth Proportional to 651,565.56, 978,423.21 and 439,694.67

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Solution

The fourth proportional to 651,565.56, 978,423.21 and 439,694.67 is: 660,267.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,565.56 : 978,423.21 = 439,694.67 : x
  2. Step 2: Convert to fraction form
    651,565.56/978,423.21 = 439,694.67/x
  3. Step 3: Cross multiply
    651,565.56x = 978,423.21 × 439,694.67
  4. Step 4: Simplify right side
    651,565.56x = 430,207,470,441.29
  5. Step 5: Solve for x
    x = 430,207,470,441.29/651,565.56
  6. Step 6: Final answer
    x = 660,267.36

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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.