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Finding the Fourth Proportional to 520,885.56, 718,857.72 and 291,464.64

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Solution

The fourth proportional to 520,885.56, 718,857.72 and 291,464.64 is: 402,241.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,885.56 : 718,857.72 = 291,464.64 : x
  2. Step 2: Convert to fraction form
    520,885.56/718,857.72 = 291,464.64/x
  3. Step 3: Cross multiply
    520,885.56x = 718,857.72 × 291,464.64
  4. Step 4: Simplify right side
    520,885.56x = 209,521,606,571.02
  5. Step 5: Solve for x
    x = 209,521,606,571.02/520,885.56
  6. Step 6: Final answer
    x = 402,241.15

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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.