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Finding the Fourth Proportional to 555,056.55, 765,978.03 and 300,407.74

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Solution

The fourth proportional to 555,056.55, 765,978.03 and 300,407.74 is: 414,562.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,056.55 : 765,978.03 = 300,407.74 : x
  2. Step 2: Convert to fraction form
    555,056.55/765,978.03 = 300,407.74/x
  3. Step 3: Cross multiply
    555,056.55x = 765,978.03 × 300,407.74
  4. Step 4: Simplify right side
    555,056.55x = 230,105,729,839.43
  5. Step 5: Solve for x
    x = 230,105,729,839.43/555,056.55
  6. Step 6: Final answer
    x = 414,562.68

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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.