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Finding the Fourth Proportional to 310,073.22, 427,967.69 and 189,188.55

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Solution

The fourth proportional to 310,073.22, 427,967.69 and 189,188.55 is: 261,120.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,073.22 : 427,967.69 = 189,188.55 : x
  2. Step 2: Convert to fraction form
    310,073.22/427,967.69 = 189,188.55/x
  3. Step 3: Cross multiply
    310,073.22x = 427,967.69 × 189,188.55
  4. Step 4: Simplify right side
    310,073.22x = 80,966,585,772.01
  5. Step 5: Solve for x
    x = 80,966,585,772.01/310,073.22
  6. Step 6: Final answer
    x = 261,120.86

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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.