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Finding the Fourth Proportional to 391,490.54, 540,231.37 and 230,314.45

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Solution

The fourth proportional to 391,490.54, 540,231.37 and 230,314.45 is: 317,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,490.54 : 540,231.37 = 230,314.45 : x
  2. Step 2: Convert to fraction form
    391,490.54/540,231.37 = 230,314.45/x
  3. Step 3: Cross multiply
    391,490.54x = 540,231.37 × 230,314.45
  4. Step 4: Simplify right side
    391,490.54x = 124,423,091,996.09
  5. Step 5: Solve for x
    x = 124,423,091,996.09/391,490.54
  6. Step 6: Final answer
    x = 317,818.90

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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.