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Finding the Fourth Proportional to 355,321.60, 532,291.20 and 214,662.40

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Solution

The fourth proportional to 355,321.60, 532,291.20 and 214,662.40 is: 321,576.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,321.60 : 532,291.20 = 214,662.40 : x
  2. Step 2: Convert to fraction form
    355,321.60/532,291.20 = 214,662.40/x
  3. Step 3: Cross multiply
    355,321.60x = 532,291.20 × 214,662.40
  4. Step 4: Simplify right side
    355,321.60x = 114,262,906,490.88
  5. Step 5: Solve for x
    x = 114,262,906,490.88/355,321.60
  6. Step 6: Final answer
    x = 321,576.02

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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.