Home / 686,006.20-1,029,009.30-212,739.40

Finding the Fourth Proportional to 686,006.20, 1,029,009.30 and 212,739.40

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Solution

The fourth proportional to 686,006.20, 1,029,009.30 and 212,739.40 is: 319,109.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,006.20 : 1,029,009.30 = 212,739.40 : x
  2. Step 2: Convert to fraction form
    686,006.20/1,029,009.30 = 212,739.40/x
  3. Step 3: Cross multiply
    686,006.20x = 1,029,009.30 × 212,739.40
  4. Step 4: Simplify right side
    686,006.20x = 218,910,821,076.42
  5. Step 5: Solve for x
    x = 218,910,821,076.42/686,006.20
  6. Step 6: Final answer
    x = 319,109.10

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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.