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Finding the Fourth Proportional to 391,859.64, 540,825.38 and 238,986.56

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Solution

The fourth proportional to 391,859.64, 540,825.38 and 238,986.56 is: 329,837.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,859.64 : 540,825.38 = 238,986.56 : x
  2. Step 2: Convert to fraction form
    391,859.64/540,825.38 = 238,986.56/x
  3. Step 3: Cross multiply
    391,859.64x = 540,825.38 × 238,986.56
  4. Step 4: Simplify right side
    391,859.64x = 129,249,997,126.89
  5. Step 5: Solve for x
    x = 129,249,997,126.89/391,859.64
  6. Step 6: Final answer
    x = 329,837.48

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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.