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Finding the Fourth Proportional to 780,705.92, 1,077,351 and 436,520.72

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Solution

The fourth proportional to 780,705.92, 1,077,351 and 436,520.72 is: 602,385.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,705.92 : 1,077,351 = 436,520.72 : x
  2. Step 2: Convert to fraction form
    780,705.92/1,077,351 = 436,520.72/x
  3. Step 3: Cross multiply
    780,705.92x = 1,077,351 × 436,520.72
  4. Step 4: Simplify right side
    780,705.92x = 470,286,034,212.72
  5. Step 5: Solve for x
    x = 470,286,034,212.72/780,705.92
  6. Step 6: Final answer
    x = 602,385.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.