Home / 744,496.20-1,115,513.10-428,401.80

Finding the Fourth Proportional to 744,496.20, 1,115,513.10 and 428,401.80

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Solution

The fourth proportional to 744,496.20, 1,115,513.10 and 428,401.80 is: 641,894.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,496.20 : 1,115,513.10 = 428,401.80 : x
  2. Step 2: Convert to fraction form
    744,496.20/1,115,513.10 = 428,401.80/x
  3. Step 3: Cross multiply
    744,496.20x = 1,115,513.10 × 428,401.80
  4. Step 4: Simplify right side
    744,496.20x = 477,887,819,963.58
  5. Step 5: Solve for x
    x = 477,887,819,963.58/744,496.20
  6. Step 6: Final answer
    x = 641,894.24

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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.