Home / 686,046.60-1,029,069.90-212,779.80

Finding the Fourth Proportional to 686,046.60, 1,029,069.90 and 212,779.80

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Solution

The fourth proportional to 686,046.60, 1,029,069.90 and 212,779.80 is: 319,169.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,046.60 : 1,029,069.90 = 212,779.80 : x
  2. Step 2: Convert to fraction form
    686,046.60/1,029,069.90 = 212,779.80/x
  3. Step 3: Cross multiply
    686,046.60x = 1,029,069.90 × 212,779.80
  4. Step 4: Simplify right side
    686,046.60x = 218,965,287,508.02
  5. Step 5: Solve for x
    x = 218,965,287,508.02/686,046.60
  6. Step 6: Final answer
    x = 319,169.70

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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.