Home / 1,318,775.40-1,978,163.10-321,503.40

Finding the Fourth Proportional to 1,318,775.40, 1,978,163.10 and 321,503.40

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Solution

The fourth proportional to 1,318,775.40, 1,978,163.10 and 321,503.40 is: 482,255.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,775.40 : 1,978,163.10 = 321,503.40 : x
  2. Step 2: Convert to fraction form
    1,318,775.40/1,978,163.10 = 321,503.40/x
  3. Step 3: Cross multiply
    1,318,775.40x = 1,978,163.10 × 321,503.40
  4. Step 4: Simplify right side
    1,318,775.40x = 635,986,162,404.54
  5. Step 5: Solve for x
    x = 635,986,162,404.54/1,318,775.40
  6. Step 6: Final answer
    x = 482,255.10

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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.