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Finding the Fourth Proportional to 391,832.46, 540,728.31 and 228,495.55

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Solution

The fourth proportional to 391,832.46, 540,728.31 and 228,495.55 is: 315,323.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,832.46 : 540,728.31 = 228,495.55 : x
  2. Step 2: Convert to fraction form
    391,832.46/540,728.31 = 228,495.55/x
  3. Step 3: Cross multiply
    391,832.46x = 540,728.31 × 228,495.55
  4. Step 4: Simplify right side
    391,832.46x = 123,554,012,594.02
  5. Step 5: Solve for x
    x = 123,554,012,594.02/391,832.46
  6. Step 6: Final answer
    x = 315,323.58

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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.