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Finding the Fourth Proportional to 339,729.60, 509,594.40 and 87,009.60

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Solution

The fourth proportional to 339,729.60, 509,594.40 and 87,009.60 is: 130,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,729.60 : 509,594.40 = 87,009.60 : x
  2. Step 2: Convert to fraction form
    339,729.60/509,594.40 = 87,009.60/x
  3. Step 3: Cross multiply
    339,729.60x = 509,594.40 × 87,009.60
  4. Step 4: Simplify right side
    339,729.60x = 44,339,604,906.24
  5. Step 5: Solve for x
    x = 44,339,604,906.24/339,729.60
  6. Step 6: Final answer
    x = 130,514.40

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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.