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Finding the Fourth Proportional to 320,447.67, 480,673.13 and 83,790.87

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Solution

The fourth proportional to 320,447.67, 480,673.13 and 83,790.87 is: 125,686.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,447.67 : 480,673.13 = 83,790.87 : x
  2. Step 2: Convert to fraction form
    320,447.67/480,673.13 = 83,790.87/x
  3. Step 3: Cross multiply
    320,447.67x = 480,673.13 × 83,790.87
  4. Step 4: Simplify right side
    320,447.67x = 40,276,019,329.37
  5. Step 5: Solve for x
    x = 40,276,019,329.37/320,447.67
  6. Step 6: Final answer
    x = 125,686.73

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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.