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Finding the Fourth Proportional to 398,811.95, 550,367.04 and 217,523.87

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Solution

The fourth proportional to 398,811.95, 550,367.04 and 217,523.87 is: 300,186.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,811.95 : 550,367.04 = 217,523.87 : x
  2. Step 2: Convert to fraction form
    398,811.95/550,367.04 = 217,523.87/x
  3. Step 3: Cross multiply
    398,811.95x = 550,367.04 × 217,523.87
  4. Step 4: Simplify right side
    398,811.95x = 119,717,968,461.25
  5. Step 5: Solve for x
    x = 119,717,968,461.25/398,811.95
  6. Step 6: Final answer
    x = 300,186.51

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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.