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Finding the Fourth Proportional to 720,544.83, 994,355.78 and 393,858.28

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Solution

The fourth proportional to 720,544.83, 994,355.78 and 393,858.28 is: 543,526.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,544.83 : 994,355.78 = 393,858.28 : x
  2. Step 2: Convert to fraction form
    720,544.83/994,355.78 = 393,858.28/x
  3. Step 3: Cross multiply
    720,544.83x = 994,355.78 × 393,858.28
  4. Step 4: Simplify right side
    720,544.83x = 391,635,257,218.86
  5. Step 5: Solve for x
    x = 391,635,257,218.86/720,544.83
  6. Step 6: Final answer
    x = 543,526.57

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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.