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Finding the Fourth Proportional to 391,700.96, 540,546 and 221,967.52

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Solution

The fourth proportional to 391,700.96, 540,546 and 221,967.52 is: 306,314.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,700.96 : 540,546 = 221,967.52 : x
  2. Step 2: Convert to fraction form
    391,700.96/540,546 = 221,967.52/x
  3. Step 3: Cross multiply
    391,700.96x = 540,546 × 221,967.52
  4. Step 4: Simplify right side
    391,700.96x = 119,983,655,065.92
  5. Step 5: Solve for x
    x = 119,983,655,065.92/391,700.96
  6. Step 6: Final answer
    x = 306,314.43

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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.