Home / 686,348.90-1,029,043.35-405,721.70

Finding the Fourth Proportional to 686,348.90, 1,029,043.35 and 405,721.70

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Solution

The fourth proportional to 686,348.90, 1,029,043.35 and 405,721.70 is: 608,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,348.90 : 1,029,043.35 = 405,721.70 : x
  2. Step 2: Convert to fraction form
    686,348.90/1,029,043.35 = 405,721.70/x
  3. Step 3: Cross multiply
    686,348.90x = 1,029,043.35 × 405,721.70
  4. Step 4: Simplify right side
    686,348.90x = 417,505,217,335.70
  5. Step 5: Solve for x
    x = 417,505,217,335.70/686,348.90
  6. Step 6: Final answer
    x = 608,298.81

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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.