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Finding the Fourth Proportional to 289,236.38, 433,810.83 and 78,890.90

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Solution

The fourth proportional to 289,236.38, 433,810.83 and 78,890.90 is: 118,324.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,236.38 : 433,810.83 = 78,890.90 : x
  2. Step 2: Convert to fraction form
    289,236.38/433,810.83 = 78,890.90/x
  3. Step 3: Cross multiply
    289,236.38x = 433,810.83 × 78,890.90
  4. Step 4: Simplify right side
    289,236.38x = 34,223,726,808.45
  5. Step 5: Solve for x
    x = 34,223,726,808.45/289,236.38
  6. Step 6: Final answer
    x = 118,324.42

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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.