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Finding the Fourth Proportional to 399,047.88, 550,697.80 and 217,771.52

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Solution

The fourth proportional to 399,047.88, 550,697.80 and 217,771.52 is: 300,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,047.88 : 550,697.80 = 217,771.52 : x
  2. Step 2: Convert to fraction form
    399,047.88/550,697.80 = 217,771.52/x
  3. Step 3: Cross multiply
    399,047.88x = 550,697.80 × 217,771.52
  4. Step 4: Simplify right side
    399,047.88x = 119,926,296,966.66
  5. Step 5: Solve for x
    x = 119,926,296,966.66/399,047.88
  6. Step 6: Final answer
    x = 300,531.10

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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.