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Finding the Fourth Proportional to 1,281,575.79, 1,922,655.69 and 682,221.15

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Solution

The fourth proportional to 1,281,575.79, 1,922,655.69 and 682,221.15 is: 1,023,487.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,575.79 : 1,922,655.69 = 682,221.15 : x
  2. Step 2: Convert to fraction form
    1,281,575.79/1,922,655.69 = 682,221.15/x
  3. Step 3: Cross multiply
    1,281,575.79x = 1,922,655.69 × 682,221.15
  4. Step 4: Simplify right side
    1,281,575.79x = 1,311,676,375,885.84
  5. Step 5: Solve for x
    x = 1,311,676,375,885.84/1,281,575.79
  6. Step 6: Final answer
    x = 1,023,487.17

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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.