Home / 643,558.40-965,337.60-406,131.20

Finding the Fourth Proportional to 643,558.40, 965,337.60 and 406,131.20

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Solution

The fourth proportional to 643,558.40, 965,337.60 and 406,131.20 is: 609,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,558.40 : 965,337.60 = 406,131.20 : x
  2. Step 2: Convert to fraction form
    643,558.40/965,337.60 = 406,131.20/x
  3. Step 3: Cross multiply
    643,558.40x = 965,337.60 × 406,131.20
  4. Step 4: Simplify right side
    643,558.40x = 392,053,717,893.12
  5. Step 5: Solve for x
    x = 392,053,717,893.12/643,558.40
  6. Step 6: Final answer
    x = 609,196.80

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Similar ratio
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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.