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Finding the Fourth Proportional to 639,321.20, 957,292.20 and 512,370.80

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Solution

The fourth proportional to 639,321.20, 957,292.20 and 512,370.80 is: 767,202.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,321.20 : 957,292.20 = 512,370.80 : x
  2. Step 2: Convert to fraction form
    639,321.20/957,292.20 = 512,370.80/x
  3. Step 3: Cross multiply
    639,321.20x = 957,292.20 × 512,370.80
  4. Step 4: Simplify right side
    639,321.20x = 490,488,570,347.76
  5. Step 5: Solve for x
    x = 490,488,570,347.76/639,321.20
  6. Step 6: Final answer
    x = 767,202.10

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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.