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Finding the Fourth Proportional to 320,900.56, 480,989.92 and 121,085.28

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Solution

The fourth proportional to 320,900.56, 480,989.92 and 121,085.28 is: 181,491.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,900.56 : 480,989.92 = 121,085.28 : x
  2. Step 2: Convert to fraction form
    320,900.56/480,989.92 = 121,085.28/x
  3. Step 3: Cross multiply
    320,900.56x = 480,989.92 × 121,085.28
  4. Step 4: Simplify right side
    320,900.56x = 58,240,799,140.38
  5. Step 5: Solve for x
    x = 58,240,799,140.38/320,900.56
  6. Step 6: Final answer
    x = 181,491.73

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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.