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Finding the Fourth Proportional to 355,399.65, 533,310.08 and 130,917.87

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Solution

The fourth proportional to 355,399.65, 533,310.08 and 130,917.87 is: 196,454.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,399.65 : 533,310.08 = 130,917.87 : x
  2. Step 2: Convert to fraction form
    355,399.65/533,310.08 = 130,917.87/x
  3. Step 3: Cross multiply
    355,399.65x = 533,310.08 × 130,917.87
  4. Step 4: Simplify right side
    355,399.65x = 69,819,819,068.54
  5. Step 5: Solve for x
    x = 69,819,819,068.54/355,399.65
  6. Step 6: Final answer
    x = 196,454.38

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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.