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Finding the Fourth Proportional to 720,135.83, 993,779.96 and 397,824.89

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Solution

The fourth proportional to 720,135.83, 993,779.96 and 397,824.89 is: 548,994.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,135.83 : 993,779.96 = 397,824.89 : x
  2. Step 2: Convert to fraction form
    720,135.83/993,779.96 = 397,824.89/x
  3. Step 3: Cross multiply
    720,135.83x = 993,779.96 × 397,824.89
  4. Step 4: Simplify right side
    720,135.83x = 395,350,396,313.18
  5. Step 5: Solve for x
    x = 395,350,396,313.18/720,135.83
  6. Step 6: Final answer
    x = 548,994.21

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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.