Home / 811,185.86-1,216,685.84-212,204.83

Finding the Fourth Proportional to 811,185.86, 1,216,685.84 and 212,204.83

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Solution

The fourth proportional to 811,185.86, 1,216,685.84 and 212,204.83 is: 318,282.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,185.86 : 1,216,685.84 = 212,204.83 : x
  2. Step 2: Convert to fraction form
    811,185.86/1,216,685.84 = 212,204.83/x
  3. Step 3: Cross multiply
    811,185.86x = 1,216,685.84 × 212,204.83
  4. Step 4: Simplify right side
    811,185.86x = 258,186,611,840.61
  5. Step 5: Solve for x
    x = 258,186,611,840.61/811,185.86
  6. Step 6: Final answer
    x = 318,282.93

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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.