Home / 521,890.20-782,835.30-311,938.20

Finding the Fourth Proportional to 521,890.20, 782,835.30 and 311,938.20

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Solution

The fourth proportional to 521,890.20, 782,835.30 and 311,938.20 is: 467,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,890.20 : 782,835.30 = 311,938.20 : x
  2. Step 2: Convert to fraction form
    521,890.20/782,835.30 = 311,938.20/x
  3. Step 3: Cross multiply
    521,890.20x = 782,835.30 × 311,938.20
  4. Step 4: Simplify right side
    521,890.20x = 244,196,234,378.46
  5. Step 5: Solve for x
    x = 244,196,234,378.46/521,890.20
  6. Step 6: Final answer
    x = 467,907.30

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Half scale
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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.