Home / 839,309.70-1,258,964.55-278,344.20

Finding the Fourth Proportional to 839,309.70, 1,258,964.55 and 278,344.20

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Solution

The fourth proportional to 839,309.70, 1,258,964.55 and 278,344.20 is: 417,516.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,309.70 : 1,258,964.55 = 278,344.20 : x
  2. Step 2: Convert to fraction form
    839,309.70/1,258,964.55 = 278,344.20/x
  3. Step 3: Cross multiply
    839,309.70x = 1,258,964.55 × 278,344.20
  4. Step 4: Simplify right side
    839,309.70x = 350,425,480,498.11
  5. Step 5: Solve for x
    x = 350,425,480,498.11/839,309.70
  6. Step 6: Final answer
    x = 417,516.30

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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.