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Finding the Fourth Proportional to 664,998.30, 997,497.45 and 399,059.10

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Solution

The fourth proportional to 664,998.30, 997,497.45 and 399,059.10 is: 598,588.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,998.30 : 997,497.45 = 399,059.10 : x
  2. Step 2: Convert to fraction form
    664,998.30/997,497.45 = 399,059.10/x
  3. Step 3: Cross multiply
    664,998.30x = 997,497.45 × 399,059.10
  4. Step 4: Simplify right side
    664,998.30x = 398,060,434,649.30
  5. Step 5: Solve for x
    x = 398,060,434,649.30/664,998.30
  6. Step 6: Final answer
    x = 598,588.65

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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.