Home / 780,135.40-1,168,890.90-667,286.20

Finding the Fourth Proportional to 780,135.40, 1,168,890.90 and 667,286.20

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Solution

The fourth proportional to 780,135.40, 1,168,890.90 and 667,286.20 is: 999,806.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,135.40 : 1,168,890.90 = 667,286.20 : x
  2. Step 2: Convert to fraction form
    780,135.40/1,168,890.90 = 667,286.20/x
  3. Step 3: Cross multiply
    780,135.40x = 1,168,890.90 × 667,286.20
  4. Step 4: Simplify right side
    780,135.40x = 779,984,766,875.58
  5. Step 5: Solve for x
    x = 779,984,766,875.58/780,135.40
  6. Step 6: Final answer
    x = 999,806.91

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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.