Home / 686,322.20-1,029,619.38-212,987.36

Finding the Fourth Proportional to 686,322.20, 1,029,619.38 and 212,987.36

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Solution

The fourth proportional to 686,322.20, 1,029,619.38 and 212,987.36 is: 319,523.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,322.20 : 1,029,619.38 = 212,987.36 : x
  2. Step 2: Convert to fraction form
    686,322.20/1,029,619.38 = 212,987.36/x
  3. Step 3: Cross multiply
    686,322.20x = 1,029,619.38 × 212,987.36
  4. Step 4: Simplify right side
    686,322.20x = 219,295,913,551.04
  5. Step 5: Solve for x
    x = 219,295,913,551.04/686,322.20
  6. Step 6: Final answer
    x = 319,523.27

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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.