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Finding the Fourth Proportional to 665,331.85, 996,849.60 and 309,616.30

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Solution

The fourth proportional to 665,331.85, 996,849.60 and 309,616.30 is: 463,890.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,331.85 : 996,849.60 = 309,616.30 : x
  2. Step 2: Convert to fraction form
    665,331.85/996,849.60 = 309,616.30/x
  3. Step 3: Cross multiply
    665,331.85x = 996,849.60 × 309,616.30
  4. Step 4: Simplify right side
    665,331.85x = 308,640,884,808.48
  5. Step 5: Solve for x
    x = 308,640,884,808.48/665,331.85
  6. Step 6: Final answer
    x = 463,890.14

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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.