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Finding the Fourth Proportional to 520,291.25, 780,344.73 and 141,241.42

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Solution

The fourth proportional to 520,291.25, 780,344.73 and 141,241.42 is: 211,837.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,291.25 : 780,344.73 = 141,241.42 : x
  2. Step 2: Convert to fraction form
    520,291.25/780,344.73 = 141,241.42/x
  3. Step 3: Cross multiply
    520,291.25x = 780,344.73 × 141,241.42
  4. Step 4: Simplify right side
    520,291.25x = 110,216,993,146.79
  5. Step 5: Solve for x
    x = 110,216,993,146.79/520,291.25
  6. Step 6: Final answer
    x = 211,837.11

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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.