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Finding the Fourth Proportional to 391,988.87, 540,892.85 and 219,900.23

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Solution

The fourth proportional to 391,988.87, 540,892.85 and 219,900.23 is: 303,433.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,988.87 : 540,892.85 = 219,900.23 : x
  2. Step 2: Convert to fraction form
    391,988.87/540,892.85 = 219,900.23/x
  3. Step 3: Cross multiply
    391,988.87x = 540,892.85 × 219,900.23
  4. Step 4: Simplify right side
    391,988.87x = 118,942,463,387.26
  5. Step 5: Solve for x
    x = 118,942,463,387.26/391,988.87
  6. Step 6: Final answer
    x = 303,433.26

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1.5x scale

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.