Home / 811,650.72-1,217,642.13-279,102.58

Finding the Fourth Proportional to 811,650.72, 1,217,642.13 and 279,102.58

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Solution

The fourth proportional to 811,650.72, 1,217,642.13 and 279,102.58 is: 418,710.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,650.72 : 1,217,642.13 = 279,102.58 : x
  2. Step 2: Convert to fraction form
    811,650.72/1,217,642.13 = 279,102.58/x
  3. Step 3: Cross multiply
    811,650.72x = 1,217,642.13 × 279,102.58
  4. Step 4: Simplify right side
    811,650.72x = 339,847,059,999.70
  5. Step 5: Solve for x
    x = 339,847,059,999.70/811,650.72
  6. Step 6: Final answer
    x = 418,710.97

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Double scale
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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.