Home / 879,135.39-1,213,141.91-491,899.41

Finding the Fourth Proportional to 879,135.39, 1,213,141.91 and 491,899.41

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Solution

The fourth proportional to 879,135.39, 1,213,141.91 and 491,899.41 is: 678,784.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,135.39 : 1,213,141.91 = 491,899.41 : x
  2. Step 2: Convert to fraction form
    879,135.39/1,213,141.91 = 491,899.41/x
  3. Step 3: Cross multiply
    879,135.39x = 1,213,141.91 × 491,899.41
  4. Step 4: Simplify right side
    879,135.39x = 596,743,787,315.78
  5. Step 5: Solve for x
    x = 596,743,787,315.78/879,135.39
  6. Step 6: Final answer
    x = 678,784.85

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.