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Finding the Fourth Proportional to 520,741.81, 718,589.80 and 291,259.34

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Solution

The fourth proportional to 520,741.81, 718,589.80 and 291,259.34 is: 401,918.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,741.81 : 718,589.80 = 291,259.34 : x
  2. Step 2: Convert to fraction form
    520,741.81/718,589.80 = 291,259.34/x
  3. Step 3: Cross multiply
    520,741.81x = 718,589.80 × 291,259.34
  4. Step 4: Simplify right side
    520,741.81x = 209,295,990,878.73
  5. Step 5: Solve for x
    x = 209,295,990,878.73/520,741.81
  6. Step 6: Final answer
    x = 401,918.93

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Double scale
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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.