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Finding the Fourth Proportional to 664,590.20, 996,885.30 and 309,640.10

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Solution

The fourth proportional to 664,590.20, 996,885.30 and 309,640.10 is: 464,460.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,590.20 : 996,885.30 = 309,640.10 : x
  2. Step 2: Convert to fraction form
    664,590.20/996,885.30 = 309,640.10/x
  3. Step 3: Cross multiply
    664,590.20x = 996,885.30 × 309,640.10
  4. Step 4: Simplify right side
    664,590.20x = 308,675,663,980.53
  5. Step 5: Solve for x
    x = 308,675,663,980.53/664,590.20
  6. Step 6: Final answer
    x = 464,460.15

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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.