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Finding the Fourth Proportional to 521,973.55, 720,311.63 and 304,168.60

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Solution

The fourth proportional to 521,973.55, 720,311.63 and 304,168.60 is: 419,745.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,973.55 : 720,311.63 = 304,168.60 : x
  2. Step 2: Convert to fraction form
    521,973.55/720,311.63 = 304,168.60/x
  3. Step 3: Cross multiply
    521,973.55x = 720,311.63 × 304,168.60
  4. Step 4: Simplify right side
    521,973.55x = 219,096,176,739.20
  5. Step 5: Solve for x
    x = 219,096,176,739.20/521,973.55
  6. Step 6: Final answer
    x = 419,745.75

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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.