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Finding the Fourth Proportional to 2,756.49, 4,134.99 and 907.61

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Solution

The fourth proportional to 2,756.49, 4,134.99 and 907.61 is: 1,361.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.49 : 4,134.99 = 907.61 : x
  2. Step 2: Convert to fraction form
    2,756.49/4,134.99 = 907.61/x
  3. Step 3: Cross multiply
    2,756.49x = 4,134.99 × 907.61
  4. Step 4: Simplify right side
    2,756.49x = 3,752,958.27
  5. Step 5: Solve for x
    x = 3,752,958.27/2,756.49
  6. Step 6: Final answer
    x = 1,361.50

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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.