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Finding the Fourth Proportional to 520,185.60, 780,122.88 and 270,731.52

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Solution

The fourth proportional to 520,185.60, 780,122.88 and 270,731.52 is: 406,016.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,185.60 : 780,122.88 = 270,731.52 : x
  2. Step 2: Convert to fraction form
    520,185.60/780,122.88 = 270,731.52/x
  3. Step 3: Cross multiply
    520,185.60x = 780,122.88 × 270,731.52
  4. Step 4: Simplify right side
    520,185.60x = 211,203,853,089.18
  5. Step 5: Solve for x
    x = 211,203,853,089.18/520,185.60
  6. Step 6: Final answer
    x = 406,016.34

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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.