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Finding the Fourth Proportional to 287,838.80, 431,790.60 and 88,157.60

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Solution

The fourth proportional to 287,838.80, 431,790.60 and 88,157.60 is: 132,246.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,838.80 : 431,790.60 = 88,157.60 : x
  2. Step 2: Convert to fraction form
    287,838.80/431,790.60 = 88,157.60/x
  3. Step 3: Cross multiply
    287,838.80x = 431,790.60 × 88,157.60
  4. Step 4: Simplify right side
    287,838.80x = 38,065,622,998.56
  5. Step 5: Solve for x
    x = 38,065,622,998.56/287,838.80
  6. Step 6: Final answer
    x = 132,246.32

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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.