Home / 686,538.40-1,029,807.60-405,911.20

Finding the Fourth Proportional to 686,538.40, 1,029,807.60 and 405,911.20

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Solution

The fourth proportional to 686,538.40, 1,029,807.60 and 405,911.20 is: 608,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,538.40 : 1,029,807.60 = 405,911.20 : x
  2. Step 2: Convert to fraction form
    686,538.40/1,029,807.60 = 405,911.20/x
  3. Step 3: Cross multiply
    686,538.40x = 1,029,807.60 × 405,911.20
  4. Step 4: Simplify right side
    686,538.40x = 418,010,438,685.12
  5. Step 5: Solve for x
    x = 418,010,438,685.12/686,538.40
  6. Step 6: Final answer
    x = 608,866.80

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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.