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Finding the Fourth Proportional to 520,616.63, 718,445.94 and 291,171.17

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Solution

The fourth proportional to 520,616.63, 718,445.94 and 291,171.17 is: 401,813.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,616.63 : 718,445.94 = 291,171.17 : x
  2. Step 2: Convert to fraction form
    520,616.63/718,445.94 = 291,171.17/x
  3. Step 3: Cross multiply
    520,616.63x = 718,445.94 × 291,171.17
  4. Step 4: Simplify right side
    520,616.63x = 209,190,741,339.32
  5. Step 5: Solve for x
    x = 209,190,741,339.32/520,616.63
  6. Step 6: Final answer
    x = 401,813.41

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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.