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Finding the Fourth Proportional to 310,473.54, 428,499.90 and 189,684.63

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Solution

The fourth proportional to 310,473.54, 428,499.90 and 189,684.63 is: 261,793.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,473.54 : 428,499.90 = 189,684.63 : x
  2. Step 2: Convert to fraction form
    310,473.54/428,499.90 = 189,684.63/x
  3. Step 3: Cross multiply
    310,473.54x = 428,499.90 × 189,684.63
  4. Step 4: Simplify right side
    310,473.54x = 81,279,844,986.54
  5. Step 5: Solve for x
    x = 81,279,844,986.54/310,473.54
  6. Step 6: Final answer
    x = 261,793.15

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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.