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Finding the Fourth Proportional to 309,707.64, 427,527.18 and 209,241.72

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Solution

The fourth proportional to 309,707.64, 427,527.18 and 209,241.72 is: 288,841.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,707.64 : 427,527.18 = 209,241.72 : x
  2. Step 2: Convert to fraction form
    309,707.64/427,527.18 = 209,241.72/x
  3. Step 3: Cross multiply
    309,707.64x = 427,527.18 × 209,241.72
  4. Step 4: Simplify right side
    309,707.64x = 89,456,522,489.95
  5. Step 5: Solve for x
    x = 89,456,522,489.95/309,707.64
  6. Step 6: Final answer
    x = 288,841.83

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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.