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Finding the Fourth Proportional to 911,123.90, 1,366,690.96 and 303,910.54

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Solution

The fourth proportional to 911,123.90, 1,366,690.96 and 303,910.54 is: 455,867.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,123.90 : 1,366,690.96 = 303,910.54 : x
  2. Step 2: Convert to fraction form
    911,123.90/1,366,690.96 = 303,910.54/x
  3. Step 3: Cross multiply
    911,123.90x = 1,366,690.96 × 303,910.54
  4. Step 4: Simplify right side
    911,123.90x = 415,351,787,666.72
  5. Step 5: Solve for x
    x = 415,351,787,666.72/911,123.90
  6. Step 6: Final answer
    x = 455,867.51

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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.