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Finding the Fourth Proportional to 265,938.39, 398,790.86 and 99,609.75

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Solution

The fourth proportional to 265,938.39, 398,790.86 and 99,609.75 is: 149,370.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,938.39 : 398,790.86 = 99,609.75 : x
  2. Step 2: Convert to fraction form
    265,938.39/398,790.86 = 99,609.75/x
  3. Step 3: Cross multiply
    265,938.39x = 398,790.86 × 99,609.75
  4. Step 4: Simplify right side
    265,938.39x = 39,723,457,368.84
  5. Step 5: Solve for x
    x = 39,723,457,368.84/265,938.39
  6. Step 6: Final answer
    x = 149,370.90

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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.