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Finding the Fourth Proportional to 536,612.80, 804,919.20 and 287,780.80

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Solution

The fourth proportional to 536,612.80, 804,919.20 and 287,780.80 is: 431,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,612.80 : 804,919.20 = 287,780.80 : x
  2. Step 2: Convert to fraction form
    536,612.80/804,919.20 = 287,780.80/x
  3. Step 3: Cross multiply
    536,612.80x = 804,919.20 × 287,780.80
  4. Step 4: Simplify right side
    536,612.80x = 231,640,291,311.36
  5. Step 5: Solve for x
    x = 231,640,291,311.36/536,612.80
  6. Step 6: Final answer
    x = 431,671.20

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Similar ratio
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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.