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Finding the Fourth Proportional to 664,599.80, 996,899.70 and 384,663.80

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Solution

The fourth proportional to 664,599.80, 996,899.70 and 384,663.80 is: 576,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,599.80 : 996,899.70 = 384,663.80 : x
  2. Step 2: Convert to fraction form
    664,599.80/996,899.70 = 384,663.80/x
  3. Step 3: Cross multiply
    664,599.80x = 996,899.70 × 384,663.80
  4. Step 4: Simplify right side
    664,599.80x = 383,471,226,820.86
  5. Step 5: Solve for x
    x = 383,471,226,820.86/664,599.80
  6. Step 6: Final answer
    x = 576,995.70

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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.