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Finding the Fourth Proportional to 391,575.04, 539,896.32 and 331,041.28

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Solution

The fourth proportional to 391,575.04, 539,896.32 and 331,041.28 is: 456,433.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,575.04 : 539,896.32 = 331,041.28 : x
  2. Step 2: Convert to fraction form
    391,575.04/539,896.32 = 331,041.28/x
  3. Step 3: Cross multiply
    391,575.04x = 539,896.32 × 331,041.28
  4. Step 4: Simplify right side
    391,575.04x = 178,727,968,840.09
  5. Step 5: Solve for x
    x = 178,727,968,840.09/391,575.04
  6. Step 6: Final answer
    x = 456,433.51

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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.