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Finding the Fourth Proportional to 352,920.20, 529,588.62 and 139,709

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Solution

The fourth proportional to 352,920.20, 529,588.62 and 139,709 is: 209,645.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,920.20 : 529,588.62 = 139,709 : x
  2. Step 2: Convert to fraction form
    352,920.20/529,588.62 = 139,709/x
  3. Step 3: Cross multiply
    352,920.20x = 529,588.62 × 139,709
  4. Step 4: Simplify right side
    352,920.20x = 73,988,296,511.58
  5. Step 5: Solve for x
    x = 73,988,296,511.58/352,920.20
  6. Step 6: Final answer
    x = 209,645.97

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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.