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Finding the Fourth Proportional to 398,766.19, 550,291.40 and 217,477.73

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Solution

The fourth proportional to 398,766.19, 550,291.40 and 217,477.73 is: 300,116.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,766.19 : 550,291.40 = 217,477.73 : x
  2. Step 2: Convert to fraction form
    398,766.19/550,291.40 = 217,477.73/x
  3. Step 3: Cross multiply
    398,766.19x = 550,291.40 × 217,477.73
  4. Step 4: Simplify right side
    398,766.19x = 119,676,124,444.35
  5. Step 5: Solve for x
    x = 119,676,124,444.35/398,766.19
  6. Step 6: Final answer
    x = 300,116.03

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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.