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Finding the Fourth Proportional to 391,494.54, 540,236.89 and 230,318.45

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Solution

The fourth proportional to 391,494.54, 540,236.89 and 230,318.45 is: 317,824.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,494.54 : 540,236.89 = 230,318.45 : x
  2. Step 2: Convert to fraction form
    391,494.54/540,236.89 = 230,318.45/x
  3. Step 3: Cross multiply
    391,494.54x = 540,236.89 × 230,318.45
  4. Step 4: Simplify right side
    391,494.54x = 124,426,523,137.62
  5. Step 5: Solve for x
    x = 124,426,523,137.62/391,494.54
  6. Step 6: Final answer
    x = 317,824.41

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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.