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Finding the Fourth Proportional to 320,448.67, 480,674.63 and 83,791.87

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Solution

The fourth proportional to 320,448.67, 480,674.63 and 83,791.87 is: 125,688.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,448.67 : 480,674.63 = 83,791.87 : x
  2. Step 2: Convert to fraction form
    320,448.67/480,674.63 = 83,791.87/x
  3. Step 3: Cross multiply
    320,448.67x = 480,674.63 × 83,791.87
  4. Step 4: Simplify right side
    320,448.67x = 40,276,626,109.26
  5. Step 5: Solve for x
    x = 40,276,626,109.26/320,448.67
  6. Step 6: Final answer
    x = 125,688.23

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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.