Home / 811,888.20-1,217,832.30-391,206.60

Finding the Fourth Proportional to 811,888.20, 1,217,832.30 and 391,206.60

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Solution

The fourth proportional to 811,888.20, 1,217,832.30 and 391,206.60 is: 586,809.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,888.20 : 1,217,832.30 = 391,206.60 : x
  2. Step 2: Convert to fraction form
    811,888.20/1,217,832.30 = 391,206.60/x
  3. Step 3: Cross multiply
    811,888.20x = 1,217,832.30 × 391,206.60
  4. Step 4: Simplify right side
    811,888.20x = 476,424,033,453.18
  5. Step 5: Solve for x
    x = 476,424,033,453.18/811,888.20
  6. Step 6: Final answer
    x = 586,809.90

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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.