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Finding the Fourth Proportional to 664,335.90, 993,879.45 and 576,564.30

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Solution

The fourth proportional to 664,335.90, 993,879.45 and 576,564.30 is: 862,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,335.90 : 993,879.45 = 576,564.30 : x
  2. Step 2: Convert to fraction form
    664,335.90/993,879.45 = 576,564.30/x
  3. Step 3: Cross multiply
    664,335.90x = 993,879.45 × 576,564.30
  4. Step 4: Simplify right side
    664,335.90x = 573,035,409,373.64
  5. Step 5: Solve for x
    x = 573,035,409,373.64/664,335.90
  6. Step 6: Final answer
    x = 862,568.78

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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.