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Finding the Fourth Proportional to 512,424.80, 768,637.20 and 180,000.80

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Solution

The fourth proportional to 512,424.80, 768,637.20 and 180,000.80 is: 270,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,424.80 : 768,637.20 = 180,000.80 : x
  2. Step 2: Convert to fraction form
    512,424.80/768,637.20 = 180,000.80/x
  3. Step 3: Cross multiply
    512,424.80x = 768,637.20 × 180,000.80
  4. Step 4: Simplify right side
    512,424.80x = 138,355,310,909.76
  5. Step 5: Solve for x
    x = 138,355,310,909.76/512,424.80
  6. Step 6: Final answer
    x = 270,001.20

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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.