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Finding the Fourth Proportional to 839,908.70, 1,259,863.05 and 485,614.70

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Solution

The fourth proportional to 839,908.70, 1,259,863.05 and 485,614.70 is: 728,422.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,908.70 : 1,259,863.05 = 485,614.70 : x
  2. Step 2: Convert to fraction form
    839,908.70/1,259,863.05 = 485,614.70/x
  3. Step 3: Cross multiply
    839,908.70x = 1,259,863.05 × 485,614.70
  4. Step 4: Simplify right side
    839,908.70x = 611,808,017,066.84
  5. Step 5: Solve for x
    x = 611,808,017,066.84/839,908.70
  6. Step 6: Final answer
    x = 728,422.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.