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Finding the Fourth Proportional to 512,445.20, 768,667.80 and 325,821.20

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Solution

The fourth proportional to 512,445.20, 768,667.80 and 325,821.20 is: 488,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,445.20 : 768,667.80 = 325,821.20 : x
  2. Step 2: Convert to fraction form
    512,445.20/768,667.80 = 325,821.20/x
  3. Step 3: Cross multiply
    512,445.20x = 768,667.80 × 325,821.20
  4. Step 4: Simplify right side
    512,445.20x = 250,448,264,997.36
  5. Step 5: Solve for x
    x = 250,448,264,997.36/512,445.20
  6. Step 6: Final answer
    x = 488,731.80

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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.