Home / 839,920.20-1,259,880.30-485,626.20

Finding the Fourth Proportional to 839,920.20, 1,259,880.30 and 485,626.20

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Solution

The fourth proportional to 839,920.20, 1,259,880.30 and 485,626.20 is: 728,439.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,920.20 : 1,259,880.30 = 485,626.20 : x
  2. Step 2: Convert to fraction form
    839,920.20/1,259,880.30 = 485,626.20/x
  3. Step 3: Cross multiply
    839,920.20x = 1,259,880.30 × 485,626.20
  4. Step 4: Simplify right side
    839,920.20x = 611,830,882,543.86
  5. Step 5: Solve for x
    x = 611,830,882,543.86/839,920.20
  6. Step 6: Final answer
    x = 728,439.30

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Half scale
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Double scale
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Similar ratio
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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.