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Finding the Fourth Proportional to 734,577.80, 1,101,866.70 and 261,278.60

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Solution

The fourth proportional to 734,577.80, 1,101,866.70 and 261,278.60 is: 391,917.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    734,577.80 : 1,101,866.70 = 261,278.60 : x
  2. Step 2: Convert to fraction form
    734,577.80/1,101,866.70 = 261,278.60/x
  3. Step 3: Cross multiply
    734,577.80x = 1,101,866.70 × 261,278.60
  4. Step 4: Simplify right side
    734,577.80x = 287,894,188,762.62
  5. Step 5: Solve for x
    x = 287,894,188,762.62/734,577.80
  6. Step 6: Final answer
    x = 391,917.90

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Double scale
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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.