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Finding the Fourth Proportional to 520,681.77, 718,607.40 and 291,251.80

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Solution

The fourth proportional to 520,681.77, 718,607.40 and 291,251.80 is: 401,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,681.77 : 718,607.40 = 291,251.80 : x
  2. Step 2: Convert to fraction form
    520,681.77/718,607.40 = 291,251.80/x
  3. Step 3: Cross multiply
    520,681.77x = 718,607.40 × 291,251.80
  4. Step 4: Simplify right side
    520,681.77x = 209,295,698,743.32
  5. Step 5: Solve for x
    x = 209,295,698,743.32/520,681.77
  6. Step 6: Final answer
    x = 401,964.71

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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.