Home / 811,493.80-1,217,240.70-212,453.80

Finding the Fourth Proportional to 811,493.80, 1,217,240.70 and 212,453.80

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Solution

The fourth proportional to 811,493.80, 1,217,240.70 and 212,453.80 is: 318,680.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,493.80 : 1,217,240.70 = 212,453.80 : x
  2. Step 2: Convert to fraction form
    811,493.80/1,217,240.70 = 212,453.80/x
  3. Step 3: Cross multiply
    811,493.80x = 1,217,240.70 × 212,453.80
  4. Step 4: Simplify right side
    811,493.80x = 258,607,412,229.66
  5. Step 5: Solve for x
    x = 258,607,412,229.66/811,493.80
  6. Step 6: Final answer
    x = 318,680.70

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Double scale
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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.