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Finding the Fourth Proportional to 520,666.74, 718,586.64 and 291,236.77

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Solution

The fourth proportional to 520,666.74, 718,586.64 and 291,236.77 is: 401,943.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,666.74 : 718,586.64 = 291,236.77 : x
  2. Step 2: Convert to fraction form
    520,666.74/718,586.64 = 291,236.77/x
  3. Step 3: Cross multiply
    520,666.74x = 718,586.64 × 291,236.77
  4. Step 4: Simplify right side
    520,666.74x = 209,278,851,998.75
  5. Step 5: Solve for x
    x = 209,278,851,998.75/520,666.74
  6. Step 6: Final answer
    x = 401,943.96

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1.5x scale

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.