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Finding the Fourth Proportional to 555,063.92, 765,988.20 and 300,415.12

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Solution

The fourth proportional to 555,063.92, 765,988.20 and 300,415.12 is: 414,572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,063.92 : 765,988.20 = 300,415.12 : x
  2. Step 2: Convert to fraction form
    555,063.92/765,988.20 = 300,415.12/x
  3. Step 3: Cross multiply
    555,063.92x = 765,988.20 × 300,415.12
  4. Step 4: Simplify right side
    555,063.92x = 230,114,437,021.58
  5. Step 5: Solve for x
    x = 230,114,437,021.58/555,063.92
  6. Step 6: Final answer
    x = 414,572.86

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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.