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Finding the Fourth Proportional to 643,450.83, 888,040.89 and 371,518.27

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Solution

The fourth proportional to 643,450.83, 888,040.89 and 371,518.27 is: 512,740.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,450.83 : 888,040.89 = 371,518.27 : x
  2. Step 2: Convert to fraction form
    643,450.83/888,040.89 = 371,518.27/x
  3. Step 3: Cross multiply
    643,450.83x = 888,040.89 × 371,518.27
  4. Step 4: Simplify right side
    643,450.83x = 329,923,416,464.47
  5. Step 5: Solve for x
    x = 329,923,416,464.47/643,450.83
  6. Step 6: Final answer
    x = 512,740.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.