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Finding the Fourth Proportional to 391,652.37, 540,482.09 and 221,919.57

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Solution

The fourth proportional to 391,652.37, 540,482.09 and 221,919.57 is: 306,250.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,652.37 : 540,482.09 = 221,919.57 : x
  2. Step 2: Convert to fraction form
    391,652.37/540,482.09 = 221,919.57/x
  3. Step 3: Cross multiply
    391,652.37x = 540,482.09 × 221,919.57
  4. Step 4: Simplify right side
    391,652.37x = 119,943,551,895.90
  5. Step 5: Solve for x
    x = 119,943,551,895.90/391,652.37
  6. Step 6: Final answer
    x = 306,250.03

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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.