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Finding the Fourth Proportional to 288,998.80, 433,530.60 and 89,317.60

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Solution

The fourth proportional to 288,998.80, 433,530.60 and 89,317.60 is: 133,986.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,998.80 : 433,530.60 = 89,317.60 : x
  2. Step 2: Convert to fraction form
    288,998.80/433,530.60 = 89,317.60/x
  3. Step 3: Cross multiply
    288,998.80x = 433,530.60 × 89,317.60
  4. Step 4: Simplify right side
    288,998.80x = 38,721,912,718.56
  5. Step 5: Solve for x
    x = 38,721,912,718.56/288,998.80
  6. Step 6: Final answer
    x = 133,986.41

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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.