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Finding the Fourth Proportional to 398,657.73, 550,137.51 and 217,370.01

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Solution

The fourth proportional to 398,657.73, 550,137.51 and 217,370.01 is: 299,965.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,657.73 : 550,137.51 = 217,370.01 : x
  2. Step 2: Convert to fraction form
    398,657.73/550,137.51 = 217,370.01/x
  3. Step 3: Cross multiply
    398,657.73x = 550,137.51 × 217,370.01
  4. Step 4: Simplify right side
    398,657.73x = 119,583,396,050.08
  5. Step 5: Solve for x
    x = 119,583,396,050.08/398,657.73
  6. Step 6: Final answer
    x = 299,965.08

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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.