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Finding the Fourth Proportional to 289,020.51, 398,584.80 and 248,171.88

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Solution

The fourth proportional to 289,020.51, 398,584.80 and 248,171.88 is: 342,250.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,020.51 : 398,584.80 = 248,171.88 : x
  2. Step 2: Convert to fraction form
    289,020.51/398,584.80 = 248,171.88/x
  3. Step 3: Cross multiply
    289,020.51x = 398,584.80 × 248,171.88
  4. Step 4: Simplify right side
    289,020.51x = 98,917,539,155.42
  5. Step 5: Solve for x
    x = 98,917,539,155.42/289,020.51
  6. Step 6: Final answer
    x = 342,250.93

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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.