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Finding the Fourth Proportional to 520,008.36, 780,419.28 and 267,278.64

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Solution

The fourth proportional to 520,008.36, 780,419.28 and 267,278.64 is: 401,127.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,008.36 : 780,419.28 = 267,278.64 : x
  2. Step 2: Convert to fraction form
    520,008.36/780,419.28 = 267,278.64/x
  3. Step 3: Cross multiply
    520,008.36x = 780,419.28 × 267,278.64
  4. Step 4: Simplify right side
    520,008.36x = 208,589,403,788.18
  5. Step 5: Solve for x
    x = 208,589,403,788.18/520,008.36
  6. Step 6: Final answer
    x = 401,127.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.