Home / 744,245.70-1,115,137.35-428,151.30

Finding the Fourth Proportional to 744,245.70, 1,115,137.35 and 428,151.30

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Solution

The fourth proportional to 744,245.70, 1,115,137.35 and 428,151.30 is: 641,518.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,245.70 : 1,115,137.35 = 428,151.30 : x
  2. Step 2: Convert to fraction form
    744,245.70/1,115,137.35 = 428,151.30/x
  3. Step 3: Cross multiply
    744,245.70x = 1,115,137.35 × 428,151.30
  4. Step 4: Simplify right side
    744,245.70x = 477,447,506,081.06
  5. Step 5: Solve for x
    x = 477,447,506,081.06/744,245.70
  6. Step 6: Final answer
    x = 641,518.66

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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.