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Finding the Fourth Proportional to 328,228.39, 492,342.59 and 78,910.39

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Solution

The fourth proportional to 328,228.39, 492,342.59 and 78,910.39 is: 118,365.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,228.39 : 492,342.59 = 78,910.39 : x
  2. Step 2: Convert to fraction form
    328,228.39/492,342.59 = 78,910.39/x
  3. Step 3: Cross multiply
    328,228.39x = 492,342.59 × 78,910.39
  4. Step 4: Simplify right side
    328,228.39x = 38,850,945,790.51
  5. Step 5: Solve for x
    x = 38,850,945,790.51/328,228.39
  6. Step 6: Final answer
    x = 118,365.59

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1.5x scale

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.