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Finding the Fourth Proportional to 512,169.60, 768,254.40 and 288,220.80

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Solution

The fourth proportional to 512,169.60, 768,254.40 and 288,220.80 is: 432,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,169.60 : 768,254.40 = 288,220.80 : x
  2. Step 2: Convert to fraction form
    512,169.60/768,254.40 = 288,220.80/x
  3. Step 3: Cross multiply
    512,169.60x = 768,254.40 × 288,220.80
  4. Step 4: Simplify right side
    512,169.60x = 221,426,897,771.52
  5. Step 5: Solve for x
    x = 221,426,897,771.52/512,169.60
  6. Step 6: Final answer
    x = 432,331.20

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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.