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Finding the Fourth Proportional to 309,835.80, 427,538.25 and 173,841.39

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Solution

The fourth proportional to 309,835.80, 427,538.25 and 173,841.39 is: 239,881.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,835.80 : 427,538.25 = 173,841.39 : x
  2. Step 2: Convert to fraction form
    309,835.80/427,538.25 = 173,841.39/x
  3. Step 3: Cross multiply
    309,835.80x = 427,538.25 × 173,841.39
  4. Step 4: Simplify right side
    309,835.80x = 74,323,843,658.17
  5. Step 5: Solve for x
    x = 74,323,843,658.17/309,835.80
  6. Step 6: Final answer
    x = 239,881.39

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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.