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Finding the Fourth Proportional to 348,500.31, 521,429.90 and 206,421.81

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Solution

The fourth proportional to 348,500.31, 521,429.90 and 206,421.81 is: 308,850.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,500.31 : 521,429.90 = 206,421.81 : x
  2. Step 2: Convert to fraction form
    348,500.31/521,429.90 = 206,421.81/x
  3. Step 3: Cross multiply
    348,500.31x = 521,429.90 × 206,421.81
  4. Step 4: Simplify right side
    348,500.31x = 107,634,502,714.01
  5. Step 5: Solve for x
    x = 107,634,502,714.01/348,500.31
  6. Step 6: Final answer
    x = 308,850.52

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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.