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Finding the Fourth Proportional to 545,987.72, 753,429.89 and 300,961.74

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Solution

The fourth proportional to 545,987.72, 753,429.89 and 300,961.74 is: 415,308.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,987.72 : 753,429.89 = 300,961.74 : x
  2. Step 2: Convert to fraction form
    545,987.72/753,429.89 = 300,961.74/x
  3. Step 3: Cross multiply
    545,987.72x = 753,429.89 × 300,961.74
  4. Step 4: Simplify right side
    545,987.72x = 226,753,566,142.86
  5. Step 5: Solve for x
    x = 226,753,566,142.86/545,987.72
  6. Step 6: Final answer
    x = 415,308.92

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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.