Home / 686,072.88-1,029,208.96-212,796.32

Finding the Fourth Proportional to 686,072.88, 1,029,208.96 and 212,796.32

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Solution

The fourth proportional to 686,072.88, 1,029,208.96 and 212,796.32 is: 319,225.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,072.88 : 1,029,208.96 = 212,796.32 : x
  2. Step 2: Convert to fraction form
    686,072.88/1,029,208.96 = 212,796.32/x
  3. Step 3: Cross multiply
    686,072.88x = 1,029,208.96 × 212,796.32
  4. Step 4: Simplify right side
    686,072.88x = 219,011,879,199.03
  5. Step 5: Solve for x
    x = 219,011,879,199.03/686,072.88
  6. Step 6: Final answer
    x = 319,225.38

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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.