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Finding the Fourth Proportional to 531,331.80, 796,997.70 and 278,514.60

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Solution

The fourth proportional to 531,331.80, 796,997.70 and 278,514.60 is: 417,771.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,331.80 : 796,997.70 = 278,514.60 : x
  2. Step 2: Convert to fraction form
    531,331.80/796,997.70 = 278,514.60/x
  3. Step 3: Cross multiply
    531,331.80x = 796,997.70 × 278,514.60
  4. Step 4: Simplify right side
    531,331.80x = 221,975,495,616.42
  5. Step 5: Solve for x
    x = 221,975,495,616.42/531,331.80
  6. Step 6: Final answer
    x = 417,771.90

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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.