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Finding the Fourth Proportional to 287,911.26, 431,866.89 and 147,580.38

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Solution

The fourth proportional to 287,911.26, 431,866.89 and 147,580.38 is: 221,370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,911.26 : 431,866.89 = 147,580.38 : x
  2. Step 2: Convert to fraction form
    287,911.26/431,866.89 = 147,580.38/x
  3. Step 3: Cross multiply
    287,911.26x = 431,866.89 × 147,580.38
  4. Step 4: Simplify right side
    287,911.26x = 63,735,079,735.62
  5. Step 5: Solve for x
    x = 63,735,079,735.62/287,911.26
  6. Step 6: Final answer
    x = 221,370.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.