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Finding the Fourth Proportional to 486,015.90, 728,939.79 and 219,714.48

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Solution

The fourth proportional to 486,015.90, 728,939.79 and 219,714.48 is: 329,533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,015.90 : 728,939.79 = 219,714.48 : x
  2. Step 2: Convert to fraction form
    486,015.90/728,939.79 = 219,714.48/x
  3. Step 3: Cross multiply
    486,015.90x = 728,939.79 × 219,714.48
  4. Step 4: Simplify right side
    486,015.90x = 160,158,626,911.16
  5. Step 5: Solve for x
    x = 160,158,626,911.16/486,015.90
  6. Step 6: Final answer
    x = 329,533.72

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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.