Home / 686,475.60-1,029,713.40-213,208.80

Finding the Fourth Proportional to 686,475.60, 1,029,713.40 and 213,208.80

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Solution

The fourth proportional to 686,475.60, 1,029,713.40 and 213,208.80 is: 319,813.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,475.60 : 1,029,713.40 = 213,208.80 : x
  2. Step 2: Convert to fraction form
    686,475.60/1,029,713.40 = 213,208.80/x
  3. Step 3: Cross multiply
    686,475.60x = 1,029,713.40 × 213,208.80
  4. Step 4: Simplify right side
    686,475.60x = 219,543,958,357.92
  5. Step 5: Solve for x
    x = 219,543,958,357.92/686,475.60
  6. Step 6: Final answer
    x = 319,813.20

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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.