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Finding the Fourth Proportional to 638,807.40, 956,217.69 and 470,517.75

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Solution

The fourth proportional to 638,807.40, 956,217.69 and 470,517.75 is: 704,308.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,807.40 : 956,217.69 = 470,517.75 : x
  2. Step 2: Convert to fraction form
    638,807.40/956,217.69 = 470,517.75/x
  3. Step 3: Cross multiply
    638,807.40x = 956,217.69 × 470,517.75
  4. Step 4: Simplify right side
    638,807.40x = 449,917,396,009.00
  5. Step 5: Solve for x
    x = 449,917,396,009.00/638,807.40
  6. Step 6: Final answer
    x = 704,308.37

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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.