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Finding the Fourth Proportional to 289,938.43, 435,032.79 and 156,912.55

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Solution

The fourth proportional to 289,938.43, 435,032.79 and 156,912.55 is: 235,436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,938.43 : 435,032.79 = 156,912.55 : x
  2. Step 2: Convert to fraction form
    289,938.43/435,032.79 = 156,912.55/x
  3. Step 3: Cross multiply
    289,938.43x = 435,032.79 × 156,912.55
  4. Step 4: Simplify right side
    289,938.43x = 68,262,104,412.51
  5. Step 5: Solve for x
    x = 68,262,104,412.51/289,938.43
  6. Step 6: Final answer
    x = 235,436.55

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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.