Home / 839,912.70-1,259,869.05-520,319.10

Finding the Fourth Proportional to 839,912.70, 1,259,869.05 and 520,319.10

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Solution

The fourth proportional to 839,912.70, 1,259,869.05 and 520,319.10 is: 780,478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,912.70 : 1,259,869.05 = 520,319.10 : x
  2. Step 2: Convert to fraction form
    839,912.70/1,259,869.05 = 520,319.10/x
  3. Step 3: Cross multiply
    839,912.70x = 1,259,869.05 × 520,319.10
  4. Step 4: Simplify right side
    839,912.70x = 655,533,930,213.86
  5. Step 5: Solve for x
    x = 655,533,930,213.86/839,912.70
  6. Step 6: Final answer
    x = 780,478.65

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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.