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Finding the Fourth Proportional to 310,235.34, 428,171.06 and 189,446.66

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Solution

The fourth proportional to 310,235.34, 428,171.06 and 189,446.66 is: 261,464.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,235.34 : 428,171.06 = 189,446.66 : x
  2. Step 2: Convert to fraction form
    310,235.34/428,171.06 = 189,446.66/x
  3. Step 3: Cross multiply
    310,235.34x = 428,171.06 × 189,446.66
  4. Step 4: Simplify right side
    310,235.34x = 81,115,574,137.57
  5. Step 5: Solve for x
    x = 81,115,574,137.57/310,235.34
  6. Step 6: Final answer
    x = 261,464.65

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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.