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Finding the Fourth Proportional to 555,021.16, 765,929.20 and 300,372.28

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Solution

The fourth proportional to 555,021.16, 765,929.20 and 300,372.28 is: 414,513.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,021.16 : 765,929.20 = 300,372.28 : x
  2. Step 2: Convert to fraction form
    555,021.16/765,929.20 = 300,372.28/x
  3. Step 3: Cross multiply
    555,021.16x = 765,929.20 × 300,372.28
  4. Step 4: Simplify right side
    555,021.16x = 230,063,900,122.58
  5. Step 5: Solve for x
    x = 230,063,900,122.58/555,021.16
  6. Step 6: Final answer
    x = 414,513.75

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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.