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Finding the Fourth Proportional to 490,091.30, 687,527.50 and 490,091.30

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Solution

The fourth proportional to 490,091.30, 687,527.50 and 490,091.30 is: 687,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,091.30 : 687,527.50 = 490,091.30 : x
  2. Step 2: Convert to fraction form
    490,091.30/687,527.50 = 490,091.30/x
  3. Step 3: Cross multiply
    490,091.30x = 687,527.50 × 490,091.30
  4. Step 4: Simplify right side
    490,091.30x = 336,951,246,260.75
  5. Step 5: Solve for x
    x = 336,951,246,260.75/490,091.30
  6. Step 6: Final answer
    x = 687,527.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.