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Finding the Fourth Proportional to 289,640.10, 434,460.15 and 89,958.90

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Solution

The fourth proportional to 289,640.10, 434,460.15 and 89,958.90 is: 134,938.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,640.10 : 434,460.15 = 89,958.90 : x
  2. Step 2: Convert to fraction form
    289,640.10/434,460.15 = 89,958.90/x
  3. Step 3: Cross multiply
    289,640.10x = 434,460.15 × 89,958.90
  4. Step 4: Simplify right side
    289,640.10x = 39,083,557,187.84
  5. Step 5: Solve for x
    x = 39,083,557,187.84/289,640.10
  6. Step 6: Final answer
    x = 134,938.35

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Similar ratio
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1.5x scale

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.