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Finding the Fourth Proportional to 555,021.66, 765,929.96 and 300,372.85

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Solution

The fourth proportional to 555,021.66, 765,929.96 and 300,372.85 is: 414,514.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,021.66 : 765,929.96 = 300,372.85 : x
  2. Step 2: Convert to fraction form
    555,021.66/765,929.96 = 300,372.85/x
  3. Step 3: Cross multiply
    555,021.66x = 765,929.96 × 300,372.85
  4. Step 4: Simplify right side
    555,021.66x = 230,064,565,567.53
  5. Step 5: Solve for x
    x = 230,064,565,567.53/555,021.66
  6. Step 6: Final answer
    x = 414,514.57

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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.