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Finding the Fourth Proportional to 352,539.83, 528,447.78 and 139,221.27

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Solution

The fourth proportional to 352,539.83, 528,447.78 and 139,221.27 is: 208,688.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,539.83 : 528,447.78 = 139,221.27 : x
  2. Step 2: Convert to fraction form
    352,539.83/528,447.78 = 139,221.27/x
  3. Step 3: Cross multiply
    352,539.83x = 528,447.78 × 139,221.27
  4. Step 4: Simplify right side
    352,539.83x = 73,571,171,060.28
  5. Step 5: Solve for x
    x = 73,571,171,060.28/352,539.83
  6. Step 6: Final answer
    x = 208,688.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.