Home / 744,440.20-1,115,429.10-428,345.80

Finding the Fourth Proportional to 744,440.20, 1,115,429.10 and 428,345.80

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Solution

The fourth proportional to 744,440.20, 1,115,429.10 and 428,345.80 is: 641,810.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,440.20 : 1,115,429.10 = 428,345.80 : x
  2. Step 2: Convert to fraction form
    744,440.20/1,115,429.10 = 428,345.80/x
  3. Step 3: Cross multiply
    744,440.20x = 1,115,429.10 × 428,345.80
  4. Step 4: Simplify right side
    744,440.20x = 477,789,370,182.78
  5. Step 5: Solve for x
    x = 477,789,370,182.78/744,440.20
  6. Step 6: Final answer
    x = 641,810.28

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Double scale
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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.