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Finding the Fourth Proportional to 720,533.18, 994,338.96 and 393,852.86

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Solution

The fourth proportional to 720,533.18, 994,338.96 and 393,852.86 is: 543,518.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,533.18 : 994,338.96 = 393,852.86 : x
  2. Step 2: Convert to fraction form
    720,533.18/994,338.96 = 393,852.86/x
  3. Step 3: Cross multiply
    720,533.18x = 994,338.96 × 393,852.86
  4. Step 4: Simplify right side
    720,533.18x = 391,623,243,205.43
  5. Step 5: Solve for x
    x = 391,623,243,205.43/720,533.18
  6. Step 6: Final answer
    x = 543,518.68

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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.