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Finding the Fourth Proportional to 720,238.52, 993,902.46 and 397,941.68

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Solution

The fourth proportional to 720,238.52, 993,902.46 and 397,941.68 is: 549,144.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,238.52 : 993,902.46 = 397,941.68 : x
  2. Step 2: Convert to fraction form
    720,238.52/993,902.46 = 397,941.68/x
  3. Step 3: Cross multiply
    720,238.52x = 993,902.46 × 397,941.68
  4. Step 4: Simplify right side
    720,238.52x = 395,515,214,688.53
  5. Step 5: Solve for x
    x = 395,515,214,688.53/720,238.52
  6. Step 6: Final answer
    x = 549,144.77

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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.