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Finding the Fourth Proportional to 537,939.90, 807,687.45 and 405,747.90

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Solution

The fourth proportional to 537,939.90, 807,687.45 and 405,747.90 is: 609,208.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    537,939.90 : 807,687.45 = 405,747.90 : x
  2. Step 2: Convert to fraction form
    537,939.90/807,687.45 = 405,747.90/x
  3. Step 3: Cross multiply
    537,939.90x = 807,687.45 × 405,747.90
  4. Step 4: Simplify right side
    537,939.90x = 327,717,486,693.86
  5. Step 5: Solve for x
    x = 327,717,486,693.86/537,939.90
  6. Step 6: Final answer
    x = 609,208.36

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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.