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Finding the Fourth Proportional to 536,621.80, 804,932.70 and 287,789.80

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Solution

The fourth proportional to 536,621.80, 804,932.70 and 287,789.80 is: 431,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,621.80 : 804,932.70 = 287,789.80 : x
  2. Step 2: Convert to fraction form
    536,621.80/804,932.70 = 287,789.80/x
  3. Step 3: Cross multiply
    536,621.80x = 804,932.70 × 287,789.80
  4. Step 4: Simplify right side
    536,621.80x = 231,651,420,746.46
  5. Step 5: Solve for x
    x = 231,651,420,746.46/536,621.80
  6. Step 6: Final answer
    x = 431,684.70

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Double scale
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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.