Home / 686,588.40-1,029,882.60-405,961.20

Finding the Fourth Proportional to 686,588.40, 1,029,882.60 and 405,961.20

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Solution

The fourth proportional to 686,588.40, 1,029,882.60 and 405,961.20 is: 608,941.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,588.40 : 1,029,882.60 = 405,961.20 : x
  2. Step 2: Convert to fraction form
    686,588.40/1,029,882.60 = 405,961.20/x
  3. Step 3: Cross multiply
    686,588.40x = 1,029,882.60 × 405,961.20
  4. Step 4: Simplify right side
    686,588.40x = 418,092,376,155.12
  5. Step 5: Solve for x
    x = 418,092,376,155.12/686,588.40
  6. Step 6: Final answer
    x = 608,941.80

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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.