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Finding the Fourth Proportional to 664,493.70, 996,740.55 and 398,117.10

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Solution

The fourth proportional to 664,493.70, 996,740.55 and 398,117.10 is: 597,175.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,493.70 : 996,740.55 = 398,117.10 : x
  2. Step 2: Convert to fraction form
    664,493.70/996,740.55 = 398,117.10/x
  3. Step 3: Cross multiply
    664,493.70x = 996,740.55 × 398,117.10
  4. Step 4: Simplify right side
    664,493.70x = 396,819,457,218.41
  5. Step 5: Solve for x
    x = 396,819,457,218.41/664,493.70
  6. Step 6: Final answer
    x = 597,175.65

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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.