Home / 811,909.20-1,217,863.80-391,227.60

Finding the Fourth Proportional to 811,909.20, 1,217,863.80 and 391,227.60

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Solution

The fourth proportional to 811,909.20, 1,217,863.80 and 391,227.60 is: 586,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,909.20 : 1,217,863.80 = 391,227.60 : x
  2. Step 2: Convert to fraction form
    811,909.20/1,217,863.80 = 391,227.60/x
  3. Step 3: Cross multiply
    811,909.20x = 1,217,863.80 × 391,227.60
  4. Step 4: Simplify right side
    811,909.20x = 476,461,931,600.88
  5. Step 5: Solve for x
    x = 476,461,931,600.88/811,909.20
  6. Step 6: Final answer
    x = 586,841.40

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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.