Home / 447,622.68-671,434.08-428,185.80

Finding the Fourth Proportional to 447,622.68, 671,434.08 and 428,185.80

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Solution

The fourth proportional to 447,622.68, 671,434.08 and 428,185.80 is: 642,278.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,622.68 : 671,434.08 = 428,185.80 : x
  2. Step 2: Convert to fraction form
    447,622.68/671,434.08 = 428,185.80/x
  3. Step 3: Cross multiply
    447,622.68x = 671,434.08 × 428,185.80
  4. Step 4: Simplify right side
    447,622.68x = 287,498,538,692.06
  5. Step 5: Solve for x
    x = 287,498,538,692.06/447,622.68
  6. Step 6: Final answer
    x = 642,278.76

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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.