Home / 686,858.40-1,029,807.60-406,231.20

Finding the Fourth Proportional to 686,858.40, 1,029,807.60 and 406,231.20

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Solution

The fourth proportional to 686,858.40, 1,029,807.60 and 406,231.20 is: 609,062.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,858.40 : 1,029,807.60 = 406,231.20 : x
  2. Step 2: Convert to fraction form
    686,858.40/1,029,807.60 = 406,231.20/x
  3. Step 3: Cross multiply
    686,858.40x = 1,029,807.60 × 406,231.20
  4. Step 4: Simplify right side
    686,858.40x = 418,339,977,117.12
  5. Step 5: Solve for x
    x = 418,339,977,117.12/686,858.40
  6. Step 6: Final answer
    x = 609,062.91

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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.