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Finding the Fourth Proportional to 355,021.80, 532,380.30 and 130,308.36

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Solution

The fourth proportional to 355,021.80, 532,380.30 and 130,308.36 is: 195,406.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,021.80 : 532,380.30 = 130,308.36 : x
  2. Step 2: Convert to fraction form
    355,021.80/532,380.30 = 130,308.36/x
  3. Step 3: Cross multiply
    355,021.80x = 532,380.30 × 130,308.36
  4. Step 4: Simplify right side
    355,021.80x = 69,373,603,789.31
  5. Step 5: Solve for x
    x = 69,373,603,789.31/355,021.80
  6. Step 6: Final answer
    x = 195,406.60

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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.