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Finding the Fourth Proportional to 556,676.21, 768,131.53 and 311,648.27

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Solution

The fourth proportional to 556,676.21, 768,131.53 and 311,648.27 is: 430,028.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,676.21 : 768,131.53 = 311,648.27 : x
  2. Step 2: Convert to fraction form
    556,676.21/768,131.53 = 311,648.27/x
  3. Step 3: Cross multiply
    556,676.21x = 768,131.53 × 311,648.27
  4. Step 4: Simplify right side
    556,676.21x = 239,386,857,837.18
  5. Step 5: Solve for x
    x = 239,386,857,837.18/556,676.21
  6. Step 6: Final answer
    x = 430,028.90

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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.