Home / 1,314,633.12-1,971,949.76-428,169.12

Finding the Fourth Proportional to 1,314,633.12, 1,971,949.76 and 428,169.12

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Solution

The fourth proportional to 1,314,633.12, 1,971,949.76 and 428,169.12 is: 642,253.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314,633.12 : 1,971,949.76 = 428,169.12 : x
  2. Step 2: Convert to fraction form
    1,314,633.12/1,971,949.76 = 428,169.12/x
  3. Step 3: Cross multiply
    1,314,633.12x = 1,971,949.76 × 428,169.12
  4. Step 4: Simplify right side
    1,314,633.12x = 844,327,993,423.41
  5. Step 5: Solve for x
    x = 844,327,993,423.41/1,314,633.12
  6. Step 6: Final answer
    x = 642,253.71

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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.