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Finding the Fourth Proportional to 490,087.70, 684,723.10 and 490,087.70

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Solution

The fourth proportional to 490,087.70, 684,723.10 and 490,087.70 is: 684,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,087.70 : 684,723.10 = 490,087.70 : x
  2. Step 2: Convert to fraction form
    490,087.70/684,723.10 = 490,087.70/x
  3. Step 3: Cross multiply
    490,087.70x = 684,723.10 × 490,087.70
  4. Step 4: Simplify right side
    490,087.70x = 335,574,369,215.87
  5. Step 5: Solve for x
    x = 335,574,369,215.87/490,087.70
  6. Step 6: Final answer
    x = 684,723.10

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1.5x scale

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.