Home / 686,914.40-1,029,891.60-406,287.20

Finding the Fourth Proportional to 686,914.40, 1,029,891.60 and 406,287.20

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Solution

The fourth proportional to 686,914.40, 1,029,891.60 and 406,287.20 is: 609,146.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,914.40 : 1,029,891.60 = 406,287.20 : x
  2. Step 2: Convert to fraction form
    686,914.40/1,029,891.60 = 406,287.20/x
  3. Step 3: Cross multiply
    686,914.40x = 1,029,891.60 × 406,287.20
  4. Step 4: Simplify right side
    686,914.40x = 418,431,774,467.52
  5. Step 5: Solve for x
    x = 418,431,774,467.52/686,914.40
  6. Step 6: Final answer
    x = 609,146.90

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1.5x scale

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.